118646491401 has 27 divisors (see below), whose sum is σ = 180902842029. Its totient is φ = 74922225912.

The previous prime is 118646491399. The next prime is 118646491427. The reversal of 118646491401 is 104194646811.

The square root of 118646491401 is 344451.

It is a perfect power (a square), and thus also a powerful number.

118646491401 is a `hidden beast` number, since 1 + 1 + 86 + 46 + 491 + 40 + 1 = 666.

It is not a de Polignac number, because 118646491401 - 2¹ = 118646491399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118646491451) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 19630686 + ... + 19636728.

Almost surely, 2^118646491401 is an apocalyptic number.

118646491401 is the 344451-st square number.

118646491401 is the 172226-th centered octagonal number.

It is an amenable number.

118646491401 is a deficient number, since it is larger than the sum of its proper divisors (62256350628).

118646491401 is an frugal number, since it uses more digits than its factorization.

118646491401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12130 (or 6065 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 118646491401 in words is "one hundred eighteen billion, six hundred forty-six million, four hundred ninety-one thousand, four hundred one".