2539712557620 has 480 divisors, whose sum is σ = 9621226137600. Its totient is φ = 547849495296.

The previous prime is 2539712557619. The next prime is 2539712557631. The reversal of 2539712557620 is 267552179352.

2539712557620 is a `hidden beast` number, since 2 + 5 + 3 + 9 + 7 + 1 + 2 + 5 + 5 + 7 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 56643571 + ... + 56688389.

It is an arithmetic number, because the mean of its divisors is an integer number (20044221120).

Almost surely, 2^{2539712557620} is an apocalyptic number.

2539712557620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2539712557620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4810613068800).

2539712557620 is an abundant number, since it is smaller than the sum of its proper divisors (7081513579980).

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

2539712557620 is a wasteful number, since it uses less digits than its factorization.

2539712557620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45129 (or 45118 counting only the distinct ones).

The product of its (nonzero) digits is 7938000, while the sum is 54.

The spelling of 2539712557620 in words is "two trillion, five hundred thirty-nine billion, seven hundred twelve million, five hundred fifty-seven thousand, six hundred twenty".