2531049864651 has 96 divisors (see below), whose sum is σ = 4580195363328. Its totient is φ = 1308466897920.

The previous prime is 2531049864641. The next prime is 2531049864667. The reversal of 2531049864651 is 1564689401352.

2531049864651 is a `hidden beast` number, since 2 + 5 + 31 + 0 + 498 + 64 + 65 + 1 = 666.

It is not a de Polignac number, because 2531049864651 - 2⁹ = 2531049864139 is a prime.

It is a super-3 number, since 3×2531049864651³ (a number of 38 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2531049864641) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 127737021 + ... + 127756833.

It is an arithmetic number, because the mean of its divisors is an integer number (47710368368).

Almost surely, 2^{2531049864651} is an apocalyptic number.

2531049864651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2531049864651 is a deficient number, since it is larger than the sum of its proper divisors (2049145498677).

2531049864651 is a wasteful number, since it uses less digits than its factorization.

2531049864651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20721 (or 20718 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 2531049864651 in words is "two trillion, five hundred thirty-one billion, forty-nine million, eight hundred sixty-four thousand, six hundred fifty-one".