16881956157 has 8 divisors (see below), whose sum is σ = 24555572640. Its totient is φ = 10231488560.

The previous prime is 16881956123. The next prime is 16881956191. The reversal of 16881956157 is 75165918861.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16881956123) and next prime (16881956191).

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 16881956157 - 2⁸ = 16881955901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16881956097 and 16881956106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16881951157) 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, 255787182 + ... + 255787247.

It is an arithmetic number, because the mean of its divisors is an integer number (3069446580).

Almost surely, 2^16881956157 is an apocalyptic number.

It is an amenable number.

16881956157 is a deficient number, since it is larger than the sum of its proper divisors (7673616483).

16881956157 is a wasteful number, since it uses less digits than its factorization.

16881956157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511574443.

The product of its digits is 3628800, while the sum is 57.

The spelling of 16881956157 in words is "sixteen billion, eight hundred eighty-one million, nine hundred fifty-six thousand, one hundred fifty-seven".