78275908420 has 48 divisors (see below), whose sum is σ = 168315936768. Its totient is φ = 30564033920.

The previous prime is 78275908391. The next prime is 78275908433. The reversal of 78275908420 is 2480957287.

It is a happy number.

It is a super-2 number, since 2×78275908420² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251310 + ... + 468730.

It is an arithmetic number, because the mean of its divisors is an integer number (3506582016).

Almost surely, 2^78275908420 is an apocalyptic number.

It is an amenable number.

78275908420 is an abundant number, since it is smaller than the sum of its proper divisors (90040028348).

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

78275908420 is a wasteful number, since it uses less digits than its factorization.

78275908420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217860 (or 217858 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 78275908420 in words is "seventy-eight billion, two hundred seventy-five million, nine hundred eight thousand, four hundred twenty".