312545915601919 has 2 divisors, whose sum is σ = 312545915601920. Its totient is φ = 312545915601918.

The previous prime is 312545915601851. The next prime is 312545915601949. The reversal of 312545915601919 is 919106519545213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 312545915601919 - 2¹¹ = 312545915599871 is a prime.

It is a super-2 number, since 2×312545915601919² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312545915601949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156272957800959 + 156272957800960.

It is an arithmetic number, because the mean of its divisors is an integer number (156272957800960).

Almost surely, 2^{312545915601919} is an apocalyptic number.

312545915601919 is a deficient number, since it is larger than the sum of its proper divisors (1).

312545915601919 is an equidigital number, since it uses as much as digits as its factorization.

312545915601919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122000, while the sum is 61.

The spelling of 312545915601919 in words is "three hundred twelve trillion, five hundred forty-five billion, nine hundred fifteen million, six hundred one thousand, nine hundred nineteen".