46157478821 has 4 divisors (see below), whose sum is σ = 48872624652. Its totient is φ = 43442332992.

The previous prime is 46157478817. The next prime is 46157478833. The reversal of 46157478821 is 12887475164.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35040096100 + 11117382721 = 187190^2 + 105439^2 .

It is a cyclic number.

It is not a de Polignac number, because 46157478821 - 2² = 46157478817 is a prime.

It is a super-2 number, since 2×46157478821² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46157478811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1357572890 + ... + 1357572923.

It is an arithmetic number, because the mean of its divisors is an integer number (12218156163).

Almost surely, 2^46157478821 is an apocalyptic number.

It is an amenable number.

46157478821 is a deficient number, since it is larger than the sum of its proper divisors (2715145831).

46157478821 is a wasteful number, since it uses less digits than its factorization.

46157478821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2715145830.

The product of its digits is 3010560, while the sum is 53.

The spelling of 46157478821 in words is "forty-six billion, one hundred fifty-seven million, four hundred seventy-eight thousand, eight hundred twenty-one".