27640953690 has 64 divisors (see below), whose sum is σ = 76523802624. Its totient is φ = 6258881088.

The previous prime is 27640953569. The next prime is 27640953707. The reversal of 27640953690 is 9635904672.

It is a super-2 number, since 2×27640953690² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 592594 + ... + 637533.

It is an arithmetic number, because the mean of its divisors is an integer number (1195684416).

Almost surely, 2^27640953690 is an apocalyptic number.

27640953690 is an abundant number, since it is smaller than the sum of its proper divisors (48882848934).

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

27640953690 is a wasteful number, since it uses less digits than its factorization.

27640953690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230251.

The product of its (nonzero) digits is 2449440, while the sum is 51.

The spelling of 27640953690 in words is "twenty-seven billion, six hundred forty million, nine hundred fifty-three thousand, six hundred ninety".