140387626640 has 40 divisors (see below), whose sum is σ = 329766211320. Its totient is φ = 55576129536.

The previous prime is 140387626567. The next prime is 140387626649. The reversal of 140387626640 is 46626783041.

It can be written as a sum of positive squares in 4 ways, for example, as 26284191376 + 114103435264 = 162124^2 + 337792^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×140387626640² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140387626649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9037835 + ... + 9053354.

It is an arithmetic number, because the mean of its divisors is an integer number (8244155283).

Almost surely, 2^140387626640 is an apocalyptic number.

140387626640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140387626640 is an abundant number, since it is smaller than the sum of its proper divisors (189378584680).

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

140387626640 is a wasteful number, since it uses less digits than its factorization.

140387626640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18091299 (or 18091293 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 140387626640 in words is "one hundred forty billion, three hundred eighty-seven million, six hundred twenty-six thousand, six hundred forty".