78401743626 has 32 divisors (see below), whose sum is σ = 166063154688. Its totient is φ = 24624555120.

The previous prime is 78401743561. The next prime is 78401743657. The reversal of 78401743626 is 62634710487.

It is a happy number.

It is a super-2 number, since 2×78401743626² (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 15 ways as a sum of consecutive naturals, for example, 4230520 + ... + 4249011.

It is an arithmetic number, because the mean of its divisors is an integer number (5189473584).

Almost surely, 2^78401743626 is an apocalyptic number.

78401743626 is an abundant number, since it is smaller than the sum of its proper divisors (87661411062).

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

78401743626 is a wasteful number, since it uses less digits than its factorization.

78401743626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8479626.

The product of its (nonzero) digits is 1354752, while the sum is 48.

The spelling of 78401743626 in words is "seventy-eight billion, four hundred one million, seven hundred forty-three thousand, six hundred twenty-six".