618915916 has 24 divisors (see below), whose sum is σ = 1095915744. Its totient is φ = 305813760.

The previous prime is 618915887. The next prime is 618915971. The reversal of 618915916 is 619519816.

It is a happy number.

It is a super-2 number, since 2×618915916² = 766113822156238112, which contains 22 as substring.

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, 166761 + ... + 170431.

It is an arithmetic number, because the mean of its divisors is an integer number (45663156).

Almost surely, 2^618915916 is an apocalyptic number.

It is an amenable number.

618915916 is a deficient number, since it is larger than the sum of its proper divisors (476999828).

618915916 is a wasteful number, since it uses less digits than its factorization.

618915916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161 (or 4159 counting only the distinct ones).

The product of its digits is 116640, while the sum is 46.

The square root of 618915916 is about 24878.0207412085. The cubic root of 618915916 is about 852.2046188727.

The spelling of 618915916 in words is "six hundred eighteen million, nine hundred fifteen thousand, nine hundred sixteen".