78540288157220 has 24 divisors (see below), whose sum is σ = 164939194401408. Its totient is φ = 31415241116000.

The previous prime is 78540288157213. The next prime is 78540288157291. The reversal of 78540288157220 is 2275188204587.

It is a self number, because there is not a number n which added to its sum of digits gives 78540288157220.

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, 53897186 + ... + 55335225.

It is an arithmetic number, because the mean of its divisors is an integer number (6872466433392).

Almost surely, 2^{78540288157220} is an apocalyptic number.

It is an amenable number.

78540288157220 is an abundant number, since it is smaller than the sum of its proper divisors (86398906244188).

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

78540288157220 is a wasteful number, since it uses less digits than its factorization.

78540288157220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109268371 (or 109268369 counting only the distinct ones).

The product of its (nonzero) digits is 20070400, while the sum is 59.

The spelling of 78540288157220 in words is "seventy-eight trillion, five hundred forty billion, two hundred eighty-eight million, one hundred fifty-seven thousand, two hundred twenty".