2571215664 has 40 divisors (see below), whose sum is σ = 6671341360. Its totient is φ = 853325568.

The previous prime is 2571215663. The next prime is 2571215683. The reversal of 2571215664 is 4665121752.

It is a super-2 number, since 2×2571215664² = 13222299981597921792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2571215663) 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, 105967 + ... + 127950.

It is an arithmetic number, because the mean of its divisors is an integer number (166783534).

Almost surely, 2^2571215664 is an apocalyptic number.

2571215664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2571215664 is an abundant number, since it is smaller than the sum of its proper divisors (4100125696).

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

2571215664 is a wasteful number, since it uses less digits than its factorization.

2571215664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234157 (or 234151 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 2571215664 is about 50707.1559446988. The cubic root of 2571215664 is about 1369.9756089926.

The spelling of 2571215664 in words is "two billion, five hundred seventy-one million, two hundred fifteen thousand, six hundred sixty-four".