1613798663 has 12 divisors (see below), whose sum is σ = 1676906304. Its totient is φ = 1552752000.

The previous prime is 1613798653. The next prime is 1613798677. The reversal of 1613798663 is 3668973161.

It is not a de Polignac number, because 1613798663 - 2¹⁶ = 1613733127 is a prime.

It is a super-2 number, since 2×1613798663² = 5208692249401175138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613798633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116138 + ... + 129288.

It is an arithmetic number, because the mean of its divisors is an integer number (139742192).

Almost surely, 2^1613798663 is an apocalyptic number.

1613798663 is a deficient number, since it is larger than the sum of its proper divisors (63107641).

1613798663 is an equidigital number, since it uses as much as digits as its factorization.

1613798663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13306 (or 13265 counting only the distinct ones).

The product of its digits is 979776, while the sum is 50.

The square root of 1613798663 is about 40172.1130014342. The cubic root of 1613798663 is about 1172.9597702849.

The spelling of 1613798663 in words is "one billion, six hundred thirteen million, seven hundred ninety-eight thousand, six hundred sixty-three".