10615457991 has 4 divisors (see below), whose sum is σ = 14153943992. Its totient is φ = 7076971992.

The previous prime is 10615457987. The next prime is 10615458011. The reversal of 10615457991 is 19975451601.

10615457991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 10615457991 - 2² = 10615457987 is a prime.

It is a super-2 number, since 2×10615457991² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10615457991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10615457971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1769242996 + ... + 1769243001.

It is an arithmetic number, because the mean of its divisors is an integer number (3538485998).

Almost surely, 2^10615457991 is an apocalyptic number.

10615457991 is a deficient number, since it is larger than the sum of its proper divisors (3538486001).

10615457991 is an equidigital number, since it uses as much as digits as its factorization.

10615457991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3538486000.

The product of its (nonzero) digits is 340200, while the sum is 48.

The spelling of 10615457991 in words is "ten billion, six hundred fifteen million, four hundred fifty-seven thousand, nine hundred ninety-one".