72412054731554 has 32 divisors (see below), whose sum is σ = 109010137912560. Its totient is φ = 36075607400448.

The previous prime is 72412054731503. The next prime is 72412054731557. The reversal of 72412054731554 is 45513745021427.

It can be written as a sum of positive squares in 8 ways, for example, as 41601506705929 + 30810548025625 = 6449923^2 + 5550725^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72412054731557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3495286004 + ... + 3495306720.

Almost surely, 2^{72412054731554} is an apocalyptic number.

72412054731554 is a deficient number, since it is larger than the sum of its proper divisors (36598083181006).

72412054731554 is a wasteful number, since it uses less digits than its factorization.

72412054731554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26822.

The product of its (nonzero) digits is 4704000, while the sum is 50.

The spelling of 72412054731554 in words is "seventy-two trillion, four hundred twelve billion, fifty-four million, seven hundred thirty-one thousand, five hundred fifty-four".