46399815451081 has 3 divisors (see below), whose sum is σ = 46399822262823. Its totient is φ = 46399808639340.

The previous prime is 46399815451037. The next prime is 46399815451103. The reversal of 46399815451081 is 18015451899364.

The square root of 46399815451081 is 6811741.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 13623481 + 46399801827600 = 3691^2 + 6811740^2 .

It is a de Polignac number, because none of the positive numbers 2^k-46399815451081 is a prime.

It is a super-2 number, since 2×46399815451081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (46399815451981) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3405871 + ... + 10217611.

It is an arithmetic number, because the mean of its divisors is an integer number (15466607420941).

Almost surely, 2^{46399815451081} is an apocalyptic number.

46399815451081 is the 6811741-st square number.

46399815451081 is the 3932761-st hex number and also the 3405871-st centered octagonal number.

It is an amenable number.

46399815451081 is a deficient number, since it is larger than the sum of its proper divisors (6811742).

46399815451081 is an frugal number, since it uses more digits than its factorization.

46399815451081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13623482 (or 6811741 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 64.

The spelling of 46399815451081 in words is "forty-six trillion, three hundred ninety-nine billion, eight hundred fifteen million, four hundred fifty-one thousand, eighty-one".