2889156861504 has 63 divisors (see below), whose sum is σ = 8281363420603. Its totient is φ = 963038689152.

The previous prime is 2889156861463. The next prime is 2889156861509. The reversal of 2889156861504 is 4051686519882.

The square root of 2889156861504 is 1699752.

It is a perfect power (a square), and thus also a powerful number.

2889156861504 is a `hidden beast` number, since 2 + 8 + 8 + 9 + 1 + 5 + 6 + 8 + 615 + 0 + 4 = 666.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2889156861509) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 40758637 + ... + 40829459.

Almost surely, 2^{2889156861504} is an apocalyptic number.

2889156861504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

2889156861504 is the 1699752-nd square number.

It is an amenable number.

2889156861504 is an abundant number, since it is smaller than the sum of its proper divisors (5392206559099).

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

2889156861504 is an frugal number, since it uses more digits than its factorization.

2889156861504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141664 (or 70828 counting only the distinct ones).

The product of its (nonzero) digits is 33177600, while the sum is 63.

The spelling of 2889156861504 in words is "two trillion, eight hundred eighty-nine billion, one hundred fifty-six million, eight hundred sixty-one thousand, five hundred four".