1618616994 has 16 divisors (see below), whose sum is σ = 3237863520. Its totient is φ = 539434080.

The previous prime is 1618616977. The next prime is 1618617029. The reversal of 1618616994 is 4996168161.

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, 11334 + ... + 58014.

It is an arithmetic number, because the mean of its divisors is an integer number (202366470).

Almost surely, 2^1618616994 is an apocalyptic number.

1618616994 is an abundant number, since it is smaller than the sum of its proper divisors (1619246526).

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

1618616994 is a wasteful number, since it uses less digits than its factorization.

1618616994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52465.

The product of its digits is 559872, while the sum is 51.

The square root of 1618616994 is about 40232.0393964810. The cubic root of 1618616994 is about 1174.1259820478.

The spelling of 1618616994 in words is "one billion, six hundred eighteen million, six hundred sixteen thousand, nine hundred ninety-four".