2561210376 has 64 divisors (see below), whose sum is σ = 6573441600. Its totient is φ = 831145728.

The previous prime is 2561210357. The next prime is 2561210381. The reversal of 2561210376 is 6730121652.

It is a super-2 number, since 2×2561210376² = 13119597180260122752, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323230 + ... + 331058.

It is an arithmetic number, because the mean of its divisors is an integer number (102710025).

Almost surely, 2^2561210376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2561210376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3286720800).

2561210376 is an abundant number, since it is smaller than the sum of its proper divisors (4012231224).

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

2561210376 is a wasteful number, since it uses less digits than its factorization.

2561210376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8198 (or 8194 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 2561210376 is about 50608.4022272982. The cubic root of 2561210376 is about 1368.1963185646.

The spelling of 2561210376 in words is "two billion, five hundred sixty-one million, two hundred ten thousand, three hundred seventy-six".