718642401 has 4 divisors (see below), whose sum is σ = 958189872. Its totient is φ = 479094932.

The previous prime is 718642399. The next prime is 718642427. The reversal of 718642401 is 104246817.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 718642401 - 2¹ = 718642399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (718642451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119773731 + ... + 119773736.

It is an arithmetic number, because the mean of its divisors is an integer number (239547468).

Almost surely, 2^718642401 is an apocalyptic number.

It is an amenable number.

718642401 is a deficient number, since it is larger than the sum of its proper divisors (239547471).

718642401 is a wasteful number, since it uses less digits than its factorization.

718642401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239547470.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 718642401 is about 26807.5064301027. The cubic root of 718642401 is about 895.7172661183.

The spelling of 718642401 in words is "seven hundred eighteen million, six hundred forty-two thousand, four hundred one".