122687684240 has 40 divisors (see below), whose sum is σ = 311180583168. Its totient is φ = 44613703040.

The previous prime is 122687684221. The next prime is 122687684281. The reversal of 122687684240 is 42486786221.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69708032 + ... + 69709791.

Almost surely, 2^122687684240 is an apocalyptic number.

122687684240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122687684240 is an abundant number, since it is smaller than the sum of its proper divisors (188492898928).

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

122687684240 is a wasteful number, since it uses less digits than its factorization.

122687684240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139417847 (or 139417841 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 50.

The spelling of 122687684240 in words is "one hundred twenty-two billion, six hundred eighty-seven million, six hundred eighty-four thousand, two hundred forty".