618861477 has 8 divisors (see below), whose sum is σ = 888621664. Its totient is φ = 380837808.

The previous prime is 618861473. The next prime is 618861487. The reversal of 618861477 is 774168816.

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

It is not a de Polignac number, because 618861477 - 2² = 618861473 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618861473) 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, 7934083 + ... + 7934160.

It is an arithmetic number, because the mean of its divisors is an integer number (111077708).

Almost surely, 2^618861477 is an apocalyptic number.

It is an amenable number.

618861477 is a deficient number, since it is larger than the sum of its proper divisors (269760187).

618861477 is a wasteful number, since it uses less digits than its factorization.

618861477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15868259.

The product of its digits is 451584, while the sum is 48.

The square root of 618861477 is about 24876.9265987581. The cubic root of 618861477 is about 852.1796318880.

The spelling of 618861477 in words is "six hundred eighteen million, eight hundred sixty-one thousand, four hundred seventy-seven".