2539451778936 has 128 divisors (see below), whose sum is σ = 6739961659200. Its totient is φ = 794574028800.

The previous prime is 2539451778923. The next prime is 2539451779027. The reversal of 2539451778936 is 6398771549352.

2539451778936 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276835246 + ... + 276844418.

Almost surely, 2^{2539451778936} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2539451778936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3369980829600).

2539451778936 is an abundant number, since it is smaller than the sum of its proper divisors (4200509880264).

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

2539451778936 is a wasteful number, since it uses less digits than its factorization.

2539451778936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10929 (or 10925 counting only the distinct ones).

The product of its digits is 342921600, while the sum is 69.

The spelling of 2539451778936 in words is "two trillion, five hundred thirty-nine billion, four hundred fifty-one million, seven hundred seventy-eight thousand, nine hundred thirty-six".