72276664235520 has 480 divisors, whose sum is σ = 244306906500096. Its totient is φ = 18218193960960.

The previous prime is 72276664235443. The next prime is 72276664235521. The reversal of 72276664235520 is 2553246667227.

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72276664235521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 317246769 + ... + 317474511.

Almost surely, 2^{72276664235520} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72276664235520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122153453250048).

72276664235520 is an abundant number, since it is smaller than the sum of its proper divisors (172030242264576).

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

72276664235520 is a wasteful number, since it uses less digits than its factorization.

72276664235520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227874 (or 227827 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 57.

The spelling of 72276664235520 in words is "seventy-two trillion, two hundred seventy-six billion, six hundred sixty-four million, two hundred thirty-five thousand, five hundred twenty".