15751085681 has 8 divisors (see below), whose sum is σ = 16002448200. Its totient is φ = 15500685312.

The previous prime is 15751085621. The next prime is 15751085687. The reversal of 15751085681 is 18658015751.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2105341456 + 13645744225 = 45884^2 + 116815^2 .

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 15751085681 - 2⁶ = 15751085617 is a prime.

It is a super-2 number, since 2×15751085681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15751085687) 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, 207500 + ... + 273053.

It is an arithmetic number, because the mean of its divisors is an integer number (2000306025).

Almost surely, 2^15751085681 is an apocalyptic number.

It is an amenable number.

15751085681 is a deficient number, since it is larger than the sum of its proper divisors (251362519).

15751085681 is an equidigital number, since it uses as much as digits as its factorization.

15751085681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481075.

The product of its (nonzero) digits is 336000, while the sum is 47.

The spelling of 15751085681 in words is "fifteen billion, seven hundred fifty-one million, eighty-five thousand, six hundred eighty-one".