2581252062909 has 16 divisors (see below), whose sum is σ = 3706461350592. Its totient is φ = 1588442179968.

The previous prime is 2581252062899. The next prime is 2581252062913. The reversal of 2581252062909 is 9092602521852.

It is a happy number.

It is not a de Polignac number, because 2581252062909 - 2⁵ = 2581252062877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2581252062209) 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, 2948014 + ... + 3722000.

It is an arithmetic number, because the mean of its divisors is an integer number (231653834412).

Almost surely, 2^{2581252062909} is an apocalyptic number.

It is an amenable number.

2581252062909 is a deficient number, since it is larger than the sum of its proper divisors (1125209287683).

2581252062909 is a wasteful number, since it uses less digits than its factorization.

2581252062909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859516.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 2581252062909 in words is "two trillion, five hundred eighty-one billion, two hundred fifty-two million, sixty-two thousand, nine hundred nine".