72951616 has 14 divisors (see below), whose sum is σ = 144763490. Its totient is φ = 36475776.

The previous prime is 72951589. The next prime is 72951631. The reversal of 72951616 is 61615927.

It can be written as a sum of positive squares in only one way, i.e., 68558400 + 4393216 = 8280^2 + 2096^2 .

It is a super-2 number, since 2×72951616² = 10643876554022912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 569871 + ... + 569998.

Almost surely, 2^72951616 is an apocalyptic number.

It is an amenable number.

72951616 is a deficient number, since it is larger than the sum of its proper divisors (71811874).

72951616 is a wasteful number, since it uses less digits than its factorization.

72951616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139881 (or 1139871 counting only the distinct ones).

The product of its digits is 22680, while the sum is 37.

The square root of 72951616 is about 8541.1718165601. The cubic root of 72951616 is about 417.8415644603.

It can be divided in two parts, 7295 and 1616, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 72951616 in words is "seventy-two million, nine hundred fifty-one thousand, six hundred sixteen".