78540154770 has 64 divisors (see below), whose sum is σ = 235008470016. Its totient is φ = 16320031680.

The previous prime is 78540154753. The next prime is 78540154799. The reversal of 78540154770 is 7745104587.

It is a super-2 number, since 2×78540154770² (a number of 23 digits) contains 22 as substring.

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, 16997724 + ... + 17002343.

It is an arithmetic number, because the mean of its divisors is an integer number (3672007344).

Almost surely, 2^78540154770 is an apocalyptic number.

78540154770 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78540154770 is an abundant number, since it is smaller than the sum of its proper divisors (156468315246).

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

78540154770 is a wasteful number, since it uses less digits than its factorization.

78540154770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34000095.

The product of its (nonzero) digits is 1097600, while the sum is 48.

The spelling of 78540154770 in words is "seventy-eight billion, five hundred forty million, one hundred fifty-four thousand, seven hundred seventy".