618370491 has 8 divisors (see below), whose sum is σ = 832499200. Its totient is φ = 408244392.

The previous prime is 618370483. The next prime is 618370499. The reversal of 618370491 is 194073816.

It is an interprime number because it is at equal distance from previous prime (618370483) and next prime (618370499).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 618370491 - 2³ = 618370483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (618370499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1000291 + ... + 1000908.

It is an arithmetic number, because the mean of its divisors is an integer number (104062400).

Almost surely, 2^618370491 is an apocalyptic number.

618370491 is a deficient number, since it is larger than the sum of its proper divisors (214128709).

618370491 is a wasteful number, since it uses less digits than its factorization.

618370491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001305.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 618370491 is about 24867.0563396635. The cubic root of 618370491 is about 851.9542077375.

The spelling of 618370491 in words is "six hundred eighteen million, three hundred seventy thousand, four hundred ninety-one".