2551017745 has 48 divisors (see below), whose sum is σ = 3387194496. Its totient is φ = 1839763200.

The previous prime is 2551017727. The next prime is 2551017757. The reversal of 2551017745 is 5477101552.

It is not a de Polignac number, because 2551017745 - 2⁷ = 2551017617 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4530834 + ... + 4531396.

It is an arithmetic number, because the mean of its divisors is an integer number (70566552).

Almost surely, 2^2551017745 is an apocalyptic number.

It is an amenable number.

2551017745 is a deficient number, since it is larger than the sum of its proper divisors (836176751).

2551017745 is a wasteful number, since it uses less digits than its factorization.

2551017745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 663 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 37.

The square root of 2551017745 is about 50507.6008636324. The cubic root of 2551017745 is about 1366.3789407840.

The spelling of 2551017745 in words is "two billion, five hundred fifty-one million, seventeen thousand, seven hundred forty-five".