2581915091 has 16 divisors (see below), whose sum is σ = 3027053568. Its totient is φ = 2156112000.

The previous prime is 2581915081. The next prime is 2581915109. The reversal of 2581915091 is 1905191852.

It is not a de Polignac number, because 2581915091 - 2¹⁴ = 2581898707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2581915081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110006 + ... + 131396.

It is an arithmetic number, because the mean of its divisors is an integer number (189190848).

Almost surely, 2^2581915091 is an apocalyptic number.

2581915091 is a deficient number, since it is larger than the sum of its proper divisors (445138477).

2581915091 is a wasteful number, since it uses less digits than its factorization.

2581915091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21842.

The product of its (nonzero) digits is 32400, while the sum is 41.

The square root of 2581915091 is about 50812.5485584024. The cubic root of 2581915091 is about 1371.8732417451.

The spelling of 2581915091 in words is "two billion, five hundred eighty-one million, nine hundred fifteen thousand, ninety-one".