72426036387 has 6 divisors (see below), whose sum is σ = 96568670028. Its totient is φ = 48283713504.

The previous prime is 72426036379. The next prime is 72426036421. The reversal of 72426036387 is 78363062427.

It is not a de Polignac number, because 72426036387 - 2³ = 72426036379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72426036337) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 388443 + ... + 543819.

It is an arithmetic number, because the mean of its divisors is an integer number (16094778338).

Almost surely, 2^72426036387 is an apocalyptic number.

72426036387 is a deficient number, since it is larger than the sum of its proper divisors (24142633641).

72426036387 is an frugal number, since it uses more digits than its factorization.

72426036387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310757 (or 155380 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 48.

Multiplying 72426036387 by its sum of digits (48), we get a square (3476449746576 = 1864524²).

The spelling of 72426036387 in words is "seventy-two billion, four hundred twenty-six million, thirty-six thousand, three hundred eighty-seven".