72426144776 has 16 divisors (see below), whose sum is σ = 139111193340. Its totient is φ = 35329826560.

The previous prime is 72426144773. The next prime is 72426144799. The reversal of 72426144776 is 67744162427.

It can be written as a sum of positive squares in 2 ways, for example, as 67326756676 + 5099388100 = 259474^2 + 71410^2 .

It is a super-2 number, since 2×72426144776² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72426144773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110405381 + ... + 110406036.

Almost surely, 2^72426144776 is an apocalyptic number.

It is an amenable number.

72426144776 is a deficient number, since it is larger than the sum of its proper divisors (66685048564).

72426144776 is a wasteful number, since it uses less digits than its factorization.

72426144776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220811464 (or 220811460 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 50.

The spelling of 72426144776 in words is "seventy-two billion, four hundred twenty-six million, one hundred forty-four thousand, seven hundred seventy-six".