140561640630 has 32 divisors (see below), whose sum is σ = 374831042400. Its totient is φ = 37483104096.

The previous prime is 140561640559. The next prime is 140561640641. The reversal of 140561640630 is 36046165041.

It is a happy number.

140561640630 is a `hidden beast` number, since 1 + 4 + 0 + 5 + 6 + 1 + 640 + 6 + 3 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260299065 + ... + 260299604.

It is an arithmetic number, because the mean of its divisors is an integer number (11713470075).

Almost surely, 2^140561640630 is an apocalyptic number.

140561640630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140561640630 is an abundant number, since it is smaller than the sum of its proper divisors (234269401770).

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

140561640630 is a wasteful number, since it uses less digits than its factorization.

140561640630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520598685 (or 520598679 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 140561640630 in words is "one hundred forty billion, five hundred sixty-one million, six hundred forty thousand, six hundred thirty".