72630537773 has 4 divisors (see below), whose sum is σ = 72632175708. Its totient is φ = 72628899840.

The previous prime is 72630537767. The next prime is 72630537857. The reversal of 72630537773 is 37773503627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4291167049 + 68339370724 = 65507^2 + 261418^2 .

It is a cyclic number.

It is not a de Polignac number, because 72630537773 - 2¹⁰ = 72630536749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72630537743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 750548 + ... + 841773.

It is an arithmetic number, because the mean of its divisors is an integer number (18158043927).

Almost surely, 2^72630537773 is an apocalyptic number.

It is an amenable number.

72630537773 is a deficient number, since it is larger than the sum of its proper divisors (1637935).

72630537773 is a wasteful number, since it uses less digits than its factorization.

72630537773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637934.

The product of its (nonzero) digits is 3889620, while the sum is 50.

The spelling of 72630537773 in words is "seventy-two billion, six hundred thirty million, five hundred thirty-seven thousand, seven hundred seventy-three".