6557681634 has 16 divisors (see below), whose sum is σ = 14988986688. Its totient is φ = 1873623312.

The previous prime is 6557681621. The next prime is 6557681651. The reversal of 6557681634 is 4361867556.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78067597 + ... + 78067680.

It is an arithmetic number, because the mean of its divisors is an integer number (936811668).

Almost surely, 2^6557681634 is an apocalyptic number.

6557681634 is an abundant number, since it is smaller than the sum of its proper divisors (8431305054).

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

6557681634 is a wasteful number, since it uses less digits than its factorization.

6557681634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156135289.

The product of its digits is 3628800, while the sum is 51.

The square root of 6557681634 is about 80979.5136685816. The cubic root of 6557681634 is about 1871.7597734648.

The spelling of 6557681634 in words is "six billion, five hundred fifty-seven million, six hundred eighty-one thousand, six hundred thirty-four".