1617178842 has 24 divisors (see below), whose sum is σ = 3504713940. Its totient is φ = 538932480.

The previous prime is 1617178837. The next prime is 1617178853. The reversal of 1617178842 is 2488717161.

It can be written as a sum of positive squares in 2 ways, for example, as 1508623281 + 108555561 = 38841^2 + 10419^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97834 + ... + 113162.

Almost surely, 2^1617178842 is an apocalyptic number.

1617178842 is an abundant number, since it is smaller than the sum of its proper divisors (1887535098).

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

1617178842 is a wasteful number, since it uses less digits than its factorization.

1617178842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21198 (or 21195 counting only the distinct ones).

The product of its digits is 150528, while the sum is 45.

The square root of 1617178842 is about 40214.1622068644. The cubic root of 1617178842 is about 1173.7781394173.

The spelling of 1617178842 in words is "one billion, six hundred seventeen million, one hundred seventy-eight thousand, eight hundred forty-two".