27638902763889 has 32 divisors (see below), whose sum is σ = 37985535684864. Its totient is φ = 17862735421440.

The previous prime is 27638902763821. The next prime is 27638902764007. The reversal of 27638902763889 is 98836720983672.

It is not a de Polignac number, because 27638902763889 - 2¹³ = 27638902755697 is a prime.

It is a super-2 number, since 2×27638902763889² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27638902763189) 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, 524699857 + ... + 524752529.

It is an arithmetic number, because the mean of its divisors is an integer number (1187047990152).

Almost surely, 2^{27638902763889} is an apocalyptic number.

It is an amenable number.

27638902763889 is a deficient number, since it is larger than the sum of its proper divisors (10346632920975).

27638902763889 is a wasteful number, since it uses less digits than its factorization.

27638902763889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69817.

The product of its (nonzero) digits is 2633637888, while the sum is 78.

The spelling of 27638902763889 in words is "twenty-seven trillion, six hundred thirty-eight billion, nine hundred two million, seven hundred sixty-three thousand, eight hundred eighty-nine".