2591017620 has 96 divisors (see below), whose sum is σ = 7621689600. Its totient is φ = 656409600.

The previous prime is 2591017601. The next prime is 2591017657. The reversal of 2591017620 is 267101952.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199320 + ... + 211920.

It is an arithmetic number, because the mean of its divisors is an integer number (79392600).

Almost surely, 2^2591017620 is an apocalyptic number.

2591017620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2591017620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3810844800).

2591017620 is an abundant number, since it is smaller than the sum of its proper divisors (5030671980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2591017620 is a wasteful number, since it uses less digits than its factorization.

2591017620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12785 (or 12783 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 2591017620 is about 50902.0394483364. The cubic root of 2591017620 is about 1373.4835283361.

The spelling of 2591017620 in words is "two billion, five hundred ninety-one million, seventeen thousand, six hundred twenty".