27254670642 has 64 divisors (see below), whose sum is σ = 61467356160. Its totient is φ = 8950528512.

The previous prime is 27254670581. The next prime is 27254670661. The reversal of 27254670642 is 24607645272.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1156408 + ... + 1179740.

It is an arithmetic number, because the mean of its divisors is an integer number (960427440).

Almost surely, 2^27254670642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27254670642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30733678080).

27254670642 is an abundant number, since it is smaller than the sum of its proper divisors (34212685518).

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

27254670642 is a wasteful number, since it uses less digits than its factorization.

27254670642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23664 (or 23658 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 45.

The spelling of 27254670642 in words is "twenty-seven billion, two hundred fifty-four million, six hundred seventy thousand, six hundred forty-two".