2581653805672 has 64 divisors (see below), whose sum is σ = 5330703571200. Its totient is φ = 1167677660160.

The previous prime is 2581653805613. The next prime is 2581653805681. The reversal of 2581653805672 is 2765083561852.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4114093 + ... + 4699900.

It is an arithmetic number, because the mean of its divisors is an integer number (83292243300).

Almost surely, 2^{2581653805672} is an apocalyptic number.

It is an amenable number.

2581653805672 is an abundant number, since it is smaller than the sum of its proper divisors (2749049765528).

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

2581653805672 is a wasteful number, since it uses less digits than its factorization.

2581653805672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8814106 (or 8814102 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 58.

The spelling of 2581653805672 in words is "two trillion, five hundred eighty-one billion, six hundred fifty-three million, eight hundred five thousand, six hundred seventy-two".