2591617421 has 8 divisors (see below), whose sum is σ = 2699827200. Its totient is φ = 2485550560.

The previous prime is 2591617403. The next prime is 2591617429. The reversal of 2591617421 is 1247161952.

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

It is a cyclic number.

It is not a de Polignac number, because 2591617421 - 2²² = 2587423117 is a prime.

It is a super-4 number, since 4×2591617421⁴ (a number of 39 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591617429) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 533261 + ... + 538098.

It is an arithmetic number, because the mean of its divisors is an integer number (337478400).

Almost surely, 2^2591617421 is an apocalyptic number.

It is an amenable number.

2591617421 is a deficient number, since it is larger than the sum of its proper divisors (108209779).

2591617421 is a wasteful number, since it uses less digits than its factorization.

2591617421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071459.

The product of its digits is 30240, while the sum is 38.

The square root of 2591617421 is about 50907.9308261493. The cubic root of 2591617421 is about 1373.5895038451.

The spelling of 2591617421 in words is "two billion, five hundred ninety-one million, six hundred seventeen thousand, four hundred twenty-one".