915839515450042 has 16 divisors (see below), whose sum is σ = 1377479234219400. Its totient is φ = 456680092841280.

The previous prime is 915839515450031. The next prime is 915839515450063. The reversal of 915839515450042 is 240054515938519.

It can be written as a sum of positive squares in 4 ways, for example, as 865470559292161 + 50368956157881 = 29418881^2 + 7097109^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74842509 + ... + 86215312.

Almost surely, 2^{915839515450042} is an apocalyptic number.

915839515450042 is a deficient number, since it is larger than the sum of its proper divisors (461639718769358).

915839515450042 is a wasteful number, since it uses less digits than its factorization.

915839515450042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161065521.

The product of its (nonzero) digits is 38880000, while the sum is 61.

The spelling of 915839515450042 in words is "nine hundred fifteen trillion, eight hundred thirty-nine billion, five hundred fifteen million, four hundred fifty thousand, forty-two".