78400441626 has 32 divisors (see below), whose sum is σ = 169805885760. Its totient is φ = 23988441984.

The previous prime is 78400441621. The next prime is 78400441681. The reversal of 78400441626 is 62614400487.

It is a super-2 number, since 2×78400441626² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78400441621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2793675 + ... + 2821598.

It is an arithmetic number, because the mean of its divisors is an integer number (5306433930).

Almost surely, 2^78400441626 is an apocalyptic number.

78400441626 is an abundant number, since it is smaller than the sum of its proper divisors (91405444134).

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

78400441626 is a wasteful number, since it uses less digits than its factorization.

78400441626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5615470.

The product of its (nonzero) digits is 258048, while the sum is 42.

The spelling of 78400441626 in words is "seventy-eight billion, four hundred million, four hundred forty-one thousand, six hundred twenty-six".