915790421794 has 4 divisors (see below), whose sum is σ = 1373685632694. Its totient is φ = 457895210896.

The previous prime is 915790421789. The next prime is 915790421837. The reversal of 915790421794 is 497124097519.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 863016846169 + 52773575625 = 928987^2 + 229725^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228947605447 + ... + 228947605450.

Almost surely, 2^915790421794 is an apocalyptic number.

915790421794 is a deficient number, since it is larger than the sum of its proper divisors (457895210900).

915790421794 is a wasteful number, since it uses less digits than its factorization.

915790421794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457895210899.

The product of its (nonzero) digits is 5715360, while the sum is 58.

The spelling of 915790421794 in words is "nine hundred fifteen billion, seven hundred ninety million, four hundred twenty-one thousand, seven hundred ninety-four".