718678057 has 6 divisors (see below), whose sum is σ = 722703534. Its totient is φ = 714674880.

The previous prime is 718678003. The next prime is 718678067. The reversal of 718678057 is 750876817.

It can be written as a sum of positive squares in 3 ways, for example, as 149426176 + 569251881 = 12224^2 + 23859^2 .

It is not a de Polignac number, because 718678057 - 2¹⁵ = 718645289 is a prime.

It is a super-2 number, since 2×718678057² = 1032996299226590498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 718678057.

It is not an unprimeable number, because it can be changed into a prime (718678067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21793 + ... + 43729.

It is an arithmetic number, because the mean of its divisors is an integer number (120450589).

Almost surely, 2^718678057 is an apocalyptic number.

It is an amenable number.

718678057 is a deficient number, since it is larger than the sum of its proper divisors (4025477).

718678057 is an equidigital number, since it uses as much as digits as its factorization.

718678057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22299 (or 22118 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 49.

The square root of 718678057 is about 26808.1714594636. The cubic root of 718678057 is about 895.7320797755.

The spelling of 718678057 in words is "seven hundred eighteen million, six hundred seventy-eight thousand, fifty-seven".