718513138 has 32 divisors (see below), whose sum is σ = 1271758464. Its totient is φ = 298017792.

The previous prime is 718513129. The next prime is 718513141. The reversal of 718513138 is 831315817.

It is a super-2 number, since 2×718513138² = 1032522258957214088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a junction number, because it is equal to n+sod(n) for n = 718513097 and 718513106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96381 + ... + 103567.

It is an arithmetic number, because the mean of its divisors is an integer number (39742452).

Almost surely, 2^718513138 is an apocalyptic number.

718513138 is a deficient number, since it is larger than the sum of its proper divisors (553245326).

718513138 is a wasteful number, since it uses less digits than its factorization.

718513138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7426.

The product of its digits is 20160, while the sum is 37.

The square root of 718513138 is about 26805.0953738277. The cubic root of 718513138 is about 895.6635583477.

The spelling of 718513138 in words is "seven hundred eighteen million, five hundred thirteen thousand, one hundred thirty-eight".