45691872821 has 8 divisors (see below), whose sum is σ = 52221224640. Its totient is φ = 39163006368.

The previous prime is 45691872773. The next prime is 45691872827. The reversal of 45691872821 is 12827819654.

45691872821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45691872821 - 2¹⁸ = 45691610677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45691872827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109730 + ... + 321596.

It is an arithmetic number, because the mean of its divisors is an integer number (6527653080).

Almost surely, 2^45691872821 is an apocalyptic number.

It is an amenable number.

45691872821 is a deficient number, since it is larger than the sum of its proper divisors (6529351819).

45691872821 is a wasteful number, since it uses less digits than its factorization.

45691872821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242683.

The product of its digits is 1935360, while the sum is 53.

The spelling of 45691872821 in words is "forty-five billion, six hundred ninety-one million, eight hundred seventy-two thousand, eight hundred twenty-one".