2638249546387 has 32 divisors (see below), whose sum is σ = 3354351386624. Its totient is φ = 2018545401600.

The previous prime is 2638249546349. The next prime is 2638249546403. The reversal of 2638249546387 is 7836459428362.

2638249546387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2638249546387 is a prime.

It is a super-2 number, since 2×2638249546387² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2638249546327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3391087 + ... + 4095847.

It is an arithmetic number, because the mean of its divisors is an integer number (104823480832).

Almost surely, 2^{2638249546387} is an apocalyptic number.

2638249546387 is a deficient number, since it is larger than the sum of its proper divisors (716101840237).

2638249546387 is a wasteful number, since it uses less digits than its factorization.

2638249546387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706139.

The product of its digits is 418037760, while the sum is 67.

The spelling of 2638249546387 in words is "two trillion, six hundred thirty-eight billion, two hundred forty-nine million, five hundred forty-six thousand, three hundred eighty-seven".