2525021664 has 48 divisors (see below), whose sum is σ = 7230746880. Its totient is φ = 765157760.

The previous prime is 2525021657. The next prime is 2525021683. The reversal of 2525021664 is 4661205252.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1194504 + ... + 1196615.

It is an arithmetic number, because the mean of its divisors is an integer number (150640560).

Almost surely, 2^2525021664 is an apocalyptic number.

2525021664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2525021664 is an abundant number, since it is smaller than the sum of its proper divisors (4705725216).

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

2525021664 is a wasteful number, since it uses less digits than its factorization.

2525021664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391143 (or 2391135 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 2525021664 is about 50249.5936699990. The cubic root of 2525021664 is about 1361.7217351964.

The spelling of 2525021664 in words is "two billion, five hundred twenty-five million, twenty-one thousand, six hundred sixty-four".