611580091 has 4 divisors (see below), whose sum is σ = 623119392. Its totient is φ = 600040792.

The previous prime is 611580089. The next prime is 611580103. The reversal of 611580091 is 190085116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 611580091 - 2¹ = 611580089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (611580071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5769571 + ... + 5769676.

It is an arithmetic number, because the mean of its divisors is an integer number (155779848).

Almost surely, 2^611580091 is an apocalyptic number.

611580091 is a deficient number, since it is larger than the sum of its proper divisors (11539301).

611580091 is a wasteful number, since it uses less digits than its factorization.

611580091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11539300.

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 611580091 is about 24730.1453897869. The cubic root of 611580091 is about 848.8242526189.

The spelling of 611580091 in words is "six hundred eleven million, five hundred eighty thousand, ninety-one".