2521042668 has 18 divisors (see below), whose sum is σ = 6372635724. Its totient is φ = 840347544.

The previous prime is 2521042651. The next prime is 2521042669. The reversal of 2521042668 is 8662401252.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×2521042668² = 12711312267753116448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 70028963 = 2521042668 / (2 + 5 + 2 + 1 + 0 + 4 + 2 + 6 + 6 + 8).

It is not an unprimeable number, because it can be changed into a prime (2521042669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35014446 + ... + 35014517.

It is an arithmetic number, because the mean of its divisors is an integer number (354035318).

Almost surely, 2^2521042668 is an apocalyptic number.

It is an amenable number.

2521042668 is an abundant number, since it is smaller than the sum of its proper divisors (3851593056).

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

2521042668 is a wasteful number, since it uses less digits than its factorization.

2521042668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70028973 (or 70028968 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 2521042668 is about 50209.9857398904. The cubic root of 2521042668 is about 1361.0060800925.

The spelling of 2521042668 in words is "two billion, five hundred twenty-one million, forty-two thousand, six hundred sixty-eight".