10691777087 has 8 divisors (see below), whose sum is σ = 10779283296. Its totient is φ = 10604516832.

The previous prime is 10691777069. The next prime is 10691777123. The reversal of 10691777087 is 78077719601.

It is a happy number.

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 10691777087 - 2⁸ = 10691776831 is a prime.

It is a super-2 number, since 2×10691777087² (a number of 21 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 (10691777687) 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, 26318 + ... + 148580.

It is an arithmetic number, because the mean of its divisors is an integer number (1347410412).

Almost surely, 2^10691777087 is an apocalyptic number.

10691777087 is a deficient number, since it is larger than the sum of its proper divisors (87506209).

10691777087 is a wasteful number, since it uses less digits than its factorization.

10691777087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122977.

The product of its (nonzero) digits is 1037232, while the sum is 53.

The spelling of 10691777087 in words is "ten billion, six hundred ninety-one million, seven hundred seventy-seven thousand, eighty-seven".