140236644564 has 18 divisors (see below), whose sum is σ = 354487073850. Its totient is φ = 46745548176.

The previous prime is 140236644553. The next prime is 140236644617. The reversal of 140236644564 is 465446632041.

140236644564 is a `hidden beast` number, since 1 + 4 + 0 + 23 + 6 + 64 + 4 + 564 = 666.

It can be written as a sum of positive squares in only one way, i.e., 132017408964 + 8219235600 = 363342^2 + 90660^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1947731139 + ... + 1947731210.

It is an arithmetic number, because the mean of its divisors is an integer number (19693726325).

Almost surely, 2^140236644564 is an apocalyptic number.

It is an amenable number.

140236644564 is an abundant number, since it is smaller than the sum of its proper divisors (214250429286).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

140236644564 is a wasteful number, since it uses less digits than its factorization.

140236644564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895462359 (or 3895462354 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 45.

The spelling of 140236644564 in words is "one hundred forty billion, two hundred thirty-six million, six hundred forty-four thousand, five hundred sixty-four".