915651402381 has 112 divisors (see below), whose sum is σ = 1442182896000. Its totient is φ = 580307607936.

The previous prime is 915651402373. The next prime is 915651402467. The reversal of 915651402381 is 183204156519.

It is a happy number.

915651402381 is a `hidden beast` number, since 9 + 1 + 56 + 514 + 0 + 2 + 3 + 81 = 666.

It is not a de Polignac number, because 915651402381 - 2³ = 915651402373 is a prime.

It is a super-2 number, since 2×915651402381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (915651402301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 654503520 + ... + 654504918.

It is an arithmetic number, because the mean of its divisors is an integer number (12876633000).

Almost surely, 2^915651402381 is an apocalyptic number.

It is an amenable number.

915651402381 is a deficient number, since it is larger than the sum of its proper divisors (526531493619).

915651402381 is a wasteful number, since it uses less digits than its factorization.

915651402381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902 (or 1887 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 915651402381 in words is "nine hundred fifteen billion, six hundred fifty-one million, four hundred two thousand, three hundred eighty-one".