2505280765 has 8 divisors (see below), whose sum is σ = 3237593688. Its totient is φ = 1850053440.

The previous prime is 2505280759. The next prime is 2505280781. The reversal of 2505280765 is 5670825052.

It can be written as a sum of positive squares in 4 ways, for example, as 43731769 + 2461548996 = 6613^2 + 49614^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2505280765 - 2¹⁷ = 2505149693 is a prime.

It is a super-2 number, since 2×2505280765² = 12552863422957970450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19271326 + ... + 19271455.

It is an arithmetic number, because the mean of its divisors is an integer number (404699211).

Almost surely, 2^2505280765 is an apocalyptic number.

It is an amenable number.

2505280765 is a deficient number, since it is larger than the sum of its proper divisors (732312923).

2505280765 is a wasteful number, since it uses less digits than its factorization.

2505280765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38542799.

The product of its (nonzero) digits is 168000, while the sum is 40.

The square root of 2505280765 is about 50052.7797929346. The cubic root of 2505280765 is about 1358.1637496729.

The spelling of 2505280765 in words is "two billion, five hundred five million, two hundred eighty thousand, seven hundred sixty-five".