2581397677 has 8 divisors (see below), whose sum is σ = 2715674400. Its totient is φ = 2450138544.

The previous prime is 2581397671. The next prime is 2581397711. The reversal of 2581397677 is 7767931852.

It is a happy number.

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

It is not a de Polignac number, because 2581397677 - 2⁷ = 2581397549 is a prime.

It is a super-2 number, since 2×2581397677² = 13327227933641992658, which contains 22 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 (2581397671) 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, 752643 + ... + 756064.

It is an arithmetic number, because the mean of its divisors is an integer number (339459300).

Almost surely, 2^2581397677 is an apocalyptic number.

It is an amenable number.

2581397677 is a deficient number, since it is larger than the sum of its proper divisors (134276723).

2581397677 is a wasteful number, since it uses less digits than its factorization.

2581397677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508795.

The product of its digits is 4445280, while the sum is 55.

The square root of 2581397677 is about 50807.4569034901. The cubic root of 2581397677 is about 1371.7815948063.

The spelling of 2581397677 in words is "two billion, five hundred eighty-one million, three hundred ninety-seven thousand, six hundred seventy-seven".