394559319340051 has 2 divisors, whose sum is σ = 394559319340052. Its totient is φ = 394559319340050.

The previous prime is 394559319340027. The next prime is 394559319340061. The reversal of 394559319340051 is 150043913955493.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394559319340051 - 2⁵ = 394559319340019 is a prime.

It is not a weakly prime, because it can be changed into another prime (394559319340061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197279659670025 + 197279659670026.

It is an arithmetic number, because the mean of its divisors is an integer number (197279659670026).

Almost surely, 2^{394559319340051} is an apocalyptic number.

394559319340051 is a deficient number, since it is larger than the sum of its proper divisors (1).

394559319340051 is an equidigital number, since it uses as much as digits as its factorization.

394559319340051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366000, while the sum is 61.

The spelling of 394559319340051 in words is "three hundred ninety-four trillion, five hundred fifty-nine billion, three hundred nineteen million, three hundred forty thousand, fifty-one".