312190742889 has 32 divisors (see below), whose sum is σ = 488936822400. Its totient is φ = 196326789120.

The previous prime is 312190742869. The next prime is 312190742893. The reversal of 312190742889 is 988247091213.

312190742889 is a `hidden beast` number, since 3 + 121 + 90 + 7 + 428 + 8 + 9 = 666.

It is not a de Polignac number, because 312190742889 - 2⁷ = 312190742761 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (312190742869) 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, 1186392 + ... + 1425449.

It is an arithmetic number, because the mean of its divisors is an integer number (15279275700).

Almost surely, 2^312190742889 is an apocalyptic number.

It is an amenable number.

312190742889 is a deficient number, since it is larger than the sum of its proper divisors (176746079511).

312190742889 is a wasteful number, since it uses less digits than its factorization.

312190742889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612102 (or 2612096 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 312190742889 in words is "three hundred twelve billion, one hundred ninety million, seven hundred forty-two thousand, eight hundred eighty-nine".