2564358990 has 16 divisors (see below), whose sum is σ = 6154461648. Its totient is φ = 683829056.

The previous prime is 2564358989. The next prime is 2564358991. The reversal of 2564358990 is 998534652.

It is an interprime number because it is at equal distance from previous prime (2564358989) and next prime (2564358991).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564358991) 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, 42739287 + ... + 42739346.

It is an arithmetic number, because the mean of its divisors is an integer number (384653853).

Almost surely, 2^2564358990 is an apocalyptic number.

2564358990 is an abundant number, since it is smaller than the sum of its proper divisors (3590102658).

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

2564358990 is a wasteful number, since it uses less digits than its factorization.

2564358990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85478643.

The product of its (nonzero) digits is 2332800, while the sum is 51.

The square root of 2564358990 is about 50639.5002937430. The cubic root of 2564358990 is about 1368.7567512438.

The spelling of 2564358990 in words is "two billion, five hundred sixty-four million, three hundred fifty-eight thousand, nine hundred ninety".