618951998 has 8 divisors (see below), whose sum is σ = 1061060592. Its totient is φ = 265265136.

The previous prime is 618951979. The next prime is 618952007. The reversal of 618951998 is 899159816.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22105415 + ... + 22105442.

It is an arithmetic number, because the mean of its divisors is an integer number (132632574).

Almost surely, 2^618951998 is an apocalyptic number.

618951998 is a deficient number, since it is larger than the sum of its proper divisors (442108594).

618951998 is a wasteful number, since it uses less digits than its factorization.

618951998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44210866.

The product of its digits is 1399680, while the sum is 56.

The square root of 618951998 is about 24878.7459089079. The cubic root of 618951998 is about 852.2211793611.

The spelling of 618951998 in words is "six hundred eighteen million, nine hundred fifty-one thousand, nine hundred ninety-eight".