25264777382464 has 21 divisors (see below), whose sum is σ = 50134872412681. Its totient is φ = 12632368585600.

The previous prime is 25264777382441. The next prime is 25264777382477. The reversal of 25264777382464 is 46428377746252.

The square root of 25264777382464 is 5026408.

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

It can be written as a sum of positive squares in only one way, i.e., 8042941376064 + 17221836006400 = 2836008^2 + 4149920^2 .

It is a super-2 number, since 2×25264777382464² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25264777382464.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 39897114 + ... + 40525414.

Almost surely, 2^{25264777382464} is an apocalyptic number.

25264777382464 is the 5026408-th square number.

It is an amenable number.

25264777382464 is a deficient number, since it is larger than the sum of its proper divisors (24870095030217).

25264777382464 is an frugal number, since it uses more digits than its factorization.

25264777382464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256614 (or 628303 counting only the distinct ones).

The product of its digits is 758661120, while the sum is 67.

The spelling of 25264777382464 in words is "twenty-five trillion, two hundred sixty-four billion, seven hundred seventy-seven million, three hundred eighty-two thousand, four hundred sixty-four".