915990655242 has 64 divisors (see below), whose sum is σ = 1983088800000. Its totient is φ = 280391874048.

The previous prime is 915990655211. The next prime is 915990655247. The reversal of 915990655242 is 242556099519.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (915990655247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11912134 + ... + 11988782.

It is an arithmetic number, because the mean of its divisors is an integer number (30985762500).

Almost surely, 2^915990655242 is an apocalyptic number.

915990655242 is an abundant number, since it is smaller than the sum of its proper divisors (1067098144758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

915990655242 is a wasteful number, since it uses less digits than its factorization.

915990655242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77455.

The product of its (nonzero) digits is 8748000, while the sum is 57.

The spelling of 915990655242 in words is "nine hundred fifteen billion, nine hundred ninety million, six hundred fifty-five thousand, two hundred forty-two".