915485515491 has 8 divisors (see below), whose sum is σ = 1221379602624. Its totient is φ = 609957552680.

The previous prime is 915485515487. The next prime is 915485515493. The reversal of 915485515491 is 194515584519.

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 915485515491 - 2² = 915485515487 is a prime.

It is a super-2 number, since 2×915485515491² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (915485515493) 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, 91525245 + ... + 91535246.

It is an arithmetic number, because the mean of its divisors is an integer number (152672450328).

Almost surely, 2^915485515491 is an apocalyptic number.

915485515491 is a deficient number, since it is larger than the sum of its proper divisors (305894087133).

915485515491 is a wasteful number, since it uses less digits than its factorization.

915485515491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183062161.

The product of its digits is 6480000, while the sum is 57.

The spelling of 915485515491 in words is "nine hundred fifteen billion, four hundred eighty-five million, five hundred fifteen thousand, four hundred ninety-one".