2491155859 has 8 divisors (see below), whose sum is σ = 2553026112. Its totient is φ = 2429338560.

The previous prime is 2491155853. The next prime is 2491155889. The reversal of 2491155859 is 9585511942.

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

It is not a de Polignac number, because 2491155859 - 2⁵ = 2491155827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2491155853) 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, 92317 + ... + 116209.

It is an arithmetic number, because the mean of its divisors is an integer number (319128264).

Almost surely, 2^2491155859 is an apocalyptic number.

2491155859 is a deficient number, since it is larger than the sum of its proper divisors (61870253).

2491155859 is a wasteful number, since it uses less digits than its factorization.

2491155859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26477.

The product of its digits is 648000, while the sum is 49.

The square root of 2491155859 is about 49911.4802325076. The cubic root of 2491155859 is about 1355.6064711610.

The spelling of 2491155859 in words is "two billion, four hundred ninety-one million, one hundred fifty-five thousand, eight hundred fifty-nine".