64090511979025 has 27 divisors (see below), whose sum is σ = 92447697778641. Its totient is φ = 43947587507040.

The previous prime is 64090511979023. The next prime is 64090511979029. The reversal of 64090511979025 is 52097911509046.

The square root of 64090511979025 is 8005655.

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

It can be written as a sum of positive squares in 4 ways, for example, as 25044910151121 + 39045601827904 = 5004489^2 + 6248648^2 .

It is not a de Polignac number, because 64090511979025 - 2¹ = 64090511979023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64090511979023) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 280083559 + ... + 280312291.

Almost surely, 2^{64090511979025} is an apocalyptic number.

64090511979025 is the 8005655-th square number.

64090511979025 is the 4002828-th centered octagonal number.

It is an amenable number.

64090511979025 is a deficient number, since it is larger than the sum of its proper divisors (28357185799616).

64090511979025 is an frugal number, since it uses more digits than its factorization.

64090511979025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457490 (or 228745 counting only the distinct ones).

The product of its (nonzero) digits is 6123600, while the sum is 58.

The spelling of 64090511979025 in words is "sixty-four trillion, ninety billion, five hundred eleven million, nine hundred seventy-nine thousand, twenty-five".