78837580398 has 16 divisors (see below), whose sum is σ = 157734092880. Its totient is φ = 26269371456.

The previous prime is 78837580321. The next prime is 78837580399. The reversal of 78837580398 is 89308573887.

It is a happy number.

It is a super-2 number, since 2×78837580398² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78837580399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2438103 + ... + 2470226.

It is an arithmetic number, because the mean of its divisors is an integer number (9858380805).

Almost surely, 2^78837580398 is an apocalyptic number.

78837580398 is an abundant number, since it is smaller than the sum of its proper divisors (78896512482).

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

78837580398 is a wasteful number, since it uses less digits than its factorization.

78837580398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4911011.

The product of its (nonzero) digits is 81285120, while the sum is 66.

The spelling of 78837580398 in words is "seventy-eight billion, eight hundred thirty-seven million, five hundred eighty thousand, three hundred ninety-eight".