2581236951680 has 64 divisors (see below), whose sum is σ = 6171122954880. Its totient is φ = 1032435655680.

The previous prime is 2581236951641. The next prime is 2581236951739. The reversal of 2581236951680 is 861596321852.

It is a tau number, because it is divible by the number of its divisors (64).

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, 12073877 + ... + 12285803.

It is an arithmetic number, because the mean of its divisors is an integer number (96423796170).

Almost surely, 2^{2581236951680} is an apocalyptic number.

2581236951680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2581236951680 is an abundant number, since it is smaller than the sum of its proper divisors (3589886003200).

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

2581236951680 is a wasteful number, since it uses less digits than its factorization.

2581236951680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230977 (or 230965 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 2581236951680 in words is "two trillion, five hundred eighty-one billion, two hundred thirty-six million, nine hundred fifty-one thousand, six hundred eighty".