2512781947320 has 64 divisors (see below), whose sum is σ = 7557334261920. Its totient is φ = 668387326464.

The previous prime is 2512781947187. The next prime is 2512781947369. The reversal of 2512781947320 is 237491872152.

It is a super-2 number, since 2×2512781947320² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

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, 26324967 + ... + 26420246.

Almost surely, 2^{2512781947320} is an apocalyptic number.

2512781947320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2512781947320 is an abundant number, since it is smaller than the sum of its proper divisors (5044552314600).

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

2512781947320 is a wasteful number, since it uses less digits than its factorization.

2512781947320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52745624 (or 52745620 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 2512781947320 in words is "two trillion, five hundred twelve billion, seven hundred eighty-one million, nine hundred forty-seven thousand, three hundred twenty".