72637347485 has 4 divisors (see below), whose sum is σ = 87164816988. Its totient is φ = 58109877984.

The previous prime is 72637347473. The next prime is 72637347511. The reversal of 72637347485 is 58474373627.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58474373627 = 31 ⋅1886270117.

It can be written as a sum of positive squares in 2 ways, for example, as 9324219844 + 63313127641 = 96562^2 + 251621^2 .

It is a cyclic number.

It is not a de Polignac number, because 72637347485 - 2⁴ = 72637347469 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72637347485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7263734744 + ... + 7263734753.

It is an arithmetic number, because the mean of its divisors is an integer number (21791204247).

Almost surely, 2^72637347485 is an apocalyptic number.

It is an amenable number.

72637347485 is a deficient number, since it is larger than the sum of its proper divisors (14527469503).

72637347485 is a wasteful number, since it uses less digits than its factorization.

72637347485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14527469502.

The product of its digits is 23708160, while the sum is 56.

The spelling of 72637347485 in words is "seventy-two billion, six hundred thirty-seven million, three hundred forty-seven thousand, four hundred eighty-five".