102378418561 has 16 divisors (see below), whose sum is σ = 111449075200. Its totient is φ = 93687580800.

The previous prime is 102378418553. The next prime is 102378418579. The reversal of 102378418561 is 165814873201.

It is a cyclic number.

It is not a de Polignac number, because 102378418561 - 2³ = 102378418553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102378418061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158005 + ... + 479293.

It is an arithmetic number, because the mean of its divisors is an integer number (6965567200).

Almost surely, 2^102378418561 is an apocalyptic number.

It is an amenable number.

102378418561 is a deficient number, since it is larger than the sum of its proper divisors (9070656639).

102378418561 is a wasteful number, since it uses less digits than its factorization.

102378418561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321880.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 102378418561 in words is "one hundred two billion, three hundred seventy-eight million, four hundred eighteen thousand, five hundred sixty-one".