27245878644 has 96 divisors (see below), whose sum is σ = 64759403520. Its totient is φ = 8914894848.

The previous prime is 27245878643. The next prime is 27245878651. The reversal of 27245878644 is 44687854272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27245878643) 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, 106014964 + ... + 106015220.

It is an arithmetic number, because the mean of its divisors is an integer number (674577120).

Almost surely, 2^27245878644 is an apocalyptic number.

It is an amenable number.

27245878644 is an abundant number, since it is smaller than the sum of its proper divisors (37513524876).

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

27245878644 is a wasteful number, since it uses less digits than its factorization.

27245878644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889 (or 887 counting only the distinct ones).

The product of its digits is 24084480, while the sum is 57.

The spelling of 27245878644 in words is "twenty-seven billion, two hundred forty-five million, eight hundred seventy-eight thousand, six hundred forty-four".