46973621781 has 6 divisors (see below), whose sum is σ = 67850787030. Its totient is φ = 31315747848.

The previous prime is 46973621771. The next prime is 46973621789. The reversal of 46973621781 is 18712637964.

46973621781 is a `hidden beast` number, since 4 + 6 + 9 + 7 + 3 + 621 + 7 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28886061681 + 18087560100 = 169959^2 + 134490^2 .

It is not a de Polignac number, because 46973621781 - 2¹⁴ = 46973605397 is a prime.

It is a super-2 number, since 2×46973621781² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46973621789) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2609645646 + ... + 2609645663.

It is an arithmetic number, because the mean of its divisors is an integer number (11308464505).

Almost surely, 2^46973621781 is an apocalyptic number.

It is an amenable number.

46973621781 is a deficient number, since it is larger than the sum of its proper divisors (20877165249).

46973621781 is a wasteful number, since it uses less digits than its factorization.

46973621781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5219291315 (or 5219291312 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The spelling of 46973621781 in words is "forty-six billion, nine hundred seventy-three million, six hundred twenty-one thousand, seven hundred eighty-one".