611940857 has 16 divisors (see below), whose sum is σ = 708305472. Its totient is φ = 522501120.

The previous prime is 611940853. The next prime is 611940863. The reversal of 611940857 is 758049116.

It is not a de Polignac number, because 611940857 - 2² = 611940853 is a prime.

It is a super-2 number, since 2×611940857² = 748943224931788898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611940851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94673 + ... + 100929.

It is an arithmetic number, because the mean of its divisors is an integer number (44269092).

Almost surely, 2^611940857 is an apocalyptic number.

It is an amenable number.

611940857 is a deficient number, since it is larger than the sum of its proper divisors (96364615).

611940857 is a wasteful number, since it uses less digits than its factorization.

611940857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6808.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 611940857 is about 24737.4383677858. The cubic root of 611940857 is about 848.9911245958.

The spelling of 611940857 in words is "six hundred eleven million, nine hundred forty thousand, eight hundred fifty-seven".