72653626 has 4 divisors (see below), whose sum is σ = 108980442. Its totient is φ = 36326812.

The previous prime is 72653621. The next prime is 72653629. The reversal of 72653626 is 62635627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62635627 = 761 ⋅82307.

It can be written as a sum of positive squares in only one way, i.e., 72165025 + 488601 = 8495^2 + 699^2 .

It is not an unprimeable number, because it can be changed into a prime (72653621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18163405 + ... + 18163408.

Almost surely, 2^72653626 is an apocalyptic number.

72653626 is a deficient number, since it is larger than the sum of its proper divisors (36326816).

72653626 is a wasteful number, since it uses less digits than its factorization.

72653626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36326815.

The product of its digits is 90720, while the sum is 37.

The square root of 72653626 is about 8523.7096384145. The cubic root of 72653626 is about 417.2718602499.

The spelling of 72653626 in words is "seventy-two million, six hundred fifty-three thousand, six hundred twenty-six".