2571212664 has 96 divisors (see below), whose sum is σ = 7363923840. Its totient is φ = 809164800.

The previous prime is 2571212653. The next prime is 2571212669. The reversal of 2571212664 is 4662121752.

It is a happy number.

2571212664 is a `hidden beast` number, since 2 + 571 + 2 + 1 + 26 + 64 = 666.

It is a super-2 number, since 2×2571212664² = 13222269127027953792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2571212669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77464 + ... + 105560.

It is an arithmetic number, because the mean of its divisors is an integer number (76707540).

Almost surely, 2^2571212664 is an apocalyptic number.

2571212664 is a gapful number since it is divisible by the number (24) 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 2571212664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3681961920).

2571212664 is an abundant number, since it is smaller than the sum of its proper divisors (4792711176).

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

2571212664 is a wasteful number, since it uses less digits than its factorization.

2571212664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28181 (or 28174 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 2571212664 is about 50707.1263630666. The cubic root of 2571212664 is about 1369.9750761800.

The spelling of 2571212664 in words is "two billion, five hundred seventy-one million, two hundred twelve thousand, six hundred sixty-four".