1617139986 has 64 divisors (see below), whose sum is σ = 4162461696. Its totient is φ = 406483200.

The previous prime is 1617139973. The next prime is 1617140029. The reversal of 1617139986 is 6899317161.

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, 42135 + ... + 70778.

It is an arithmetic number, because the mean of its divisors is an integer number (65038464).

Almost surely, 2^1617139986 is an apocalyptic number.

1617139986 is an abundant number, since it is smaller than the sum of its proper divisors (2545321710).

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

1617139986 is a wasteful number, since it uses less digits than its factorization.

1617139986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112967.

The product of its digits is 489888, while the sum is 51.

The square root of 1617139986 is about 40213.6790905781. The cubic root of 1617139986 is about 1173.7687385423.

The spelling of 1617139986 in words is "one billion, six hundred seventeen million, one hundred thirty-nine thousand, nine hundred eighty-six".