265612421376 has 189 divisors, whose sum is σ = 795584177689. Its totient is φ = 88463259648.

The previous prime is 265612421341. The next prime is 265612421401. The reversal of 265612421376 is 673124216562.

The square root of 265612421376 is 515376.

It is a perfect power (a square), and thus also a powerful number.

265612421376 is a `hidden beast` number, since 2 + 6 + 5 + 612 + 4 + 21 + 3 + 7 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 136426809600 + 129185611776 = 369360^2 + 359424^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 222641836 + ... + 222643028.

Almost surely, 2^265612421376 is an apocalyptic number.

265612421376 is the 515376-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 265612421376

265612421376 is an abundant number, since it is smaller than the sum of its proper divisors (529971756313).

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

265612421376 is an frugal number, since it uses more digits than its factorization.

265612421376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420 (or 1198 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 265612421376 in words is "two hundred sixty-five billion, six hundred twelve million, four hundred twenty-one thousand, three hundred seventy-six".