78462652140840 has 128 divisors (see below), whose sum is σ = 256830774520320. Its totient is φ = 19017996192000.

The previous prime is 78462652140833. The next prime is 78462652140967. The reversal of 78462652140840 is 4804125626487.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2643727 + ... + 12802913.

It is an arithmetic number, because the mean of its divisors is an integer number (2006490425940).

Almost surely, 2^{78462652140840} is an apocalyptic number.

It is an amenable number.

78462652140840 is an abundant number, since it is smaller than the sum of its proper divisors (178368122379480).

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

78462652140840 is a wasteful number, since it uses less digits than its factorization.

78462652140840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10165063 (or 10165059 counting only the distinct ones).

The product of its (nonzero) digits is 20643840, while the sum is 57.

The spelling of 78462652140840 in words is "seventy-eight trillion, four hundred sixty-two billion, six hundred fifty-two million, one hundred forty thousand, eight hundred forty".