915990751668 has 48 divisors (see below), whose sum is σ = 2166740061696. Its totient is φ = 301126786560.

The previous prime is 915990751667. The next prime is 915990751673. The reversal of 915990751668 is 866157099519.

915990751668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 915990751599 and 915990751608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (915990751661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17417533 + ... + 17470043.

It is an arithmetic number, because the mean of its divisors is an integer number (45140417952).

Almost surely, 2^915990751668 is an apocalyptic number.

It is an amenable number.

915990751668 is an abundant number, since it is smaller than the sum of its proper divisors (1250749310028).

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

915990751668 is a wasteful number, since it uses less digits than its factorization.

915990751668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72504 (or 72502 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 66.

The spelling of 915990751668 in words is "nine hundred fifteen billion, nine hundred ninety million, seven hundred fifty-one thousand, six hundred sixty-eight".