1825721547264 has 60 divisors (see below), whose sum is σ = 5269156015266. Its totient is φ = 608573847552.

The previous prime is 1825721547211. The next prime is 1825721547271. The reversal of 1825721547264 is 4627451275281.

1825721547264 is a `hidden beast` number, since 1 + 8 + 2 + 5 + 72 + 1 + 547 + 26 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1444034822400 + 381686724864 = 1201680^2 + 617808^2 .

It is a super-4 number, since 4×1825721547264⁴ (a number of 50 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1825721547264.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 198098859 + ... + 198108074.

Almost surely, 2^{1825721547264} is an apocalyptic number.

It is an amenable number.

1825721547264 is an abundant number, since it is smaller than the sum of its proper divisors (3443434468002).

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

1825721547264 is an equidigital number, since it uses as much as digits as its factorization.

1825721547264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396206957 (or 396206938 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The spelling of 1825721547264 in words is "one trillion, eight hundred twenty-five billion, seven hundred twenty-one million, five hundred forty-seven thousand, two hundred sixty-four".