72417577456540 has 48 divisors (see below), whose sum is σ = 155062547740800. Its totient is φ = 28400929445952.

The previous prime is 72417577456537. The next prime is 72417577456603. The reversal of 72417577456540 is 4565477571427.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80516934 + ... + 81411373.

It is an arithmetic number, because the mean of its divisors is an integer number (3230469744600).

Almost surely, 2^{72417577456540} is an apocalyptic number.

It is an amenable number.

72417577456540 is an abundant number, since it is smaller than the sum of its proper divisors (82644970284260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72417577456540 is a wasteful number, since it uses less digits than its factorization.

72417577456540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161928754 (or 161928752 counting only the distinct ones).

The product of its (nonzero) digits is 230496000, while the sum is 64.

The spelling of 72417577456540 in words is "seventy-two trillion, four hundred seventeen billion, five hundred seventy-seven million, four hundred fifty-six thousand, five hundred forty".