2861567964 has 72 divisors (see below), whose sum is σ = 7479134208. Its totient is φ = 921555360.

The previous prime is 2861567957. The next prime is 2861567971. The reversal of 2861567964 is 4697651682.

It is an interprime number because it is at equal distance from previous prime (2861567957) and next prime (2861567971).

It is a super-2 number, since 2×2861567964² = 16377142425182210592, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2861567964.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 809569 + ... + 813095.

It is an arithmetic number, because the mean of its divisors is an integer number (103876864).

Almost surely, 2^2861567964 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 2861567964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3739567104).

2861567964 is an abundant number, since it is smaller than the sum of its proper divisors (4617566244).

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

2861567964 is a wasteful number, since it uses less digits than its factorization.

2861567964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295 (or 4290 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 2861567964 is about 53493.6254520106. The cubic root of 2861567964 is about 1419.7156019746.

The spelling of 2861567964 in words is "two billion, eight hundred sixty-one million, five hundred sixty-seven thousand, nine hundred sixty-four".