2509494438551 has 8 divisors (see below), whose sum is σ = 2550708281424. Its totient is φ = 2468283001920.

The previous prime is 2509494438547. The next prime is 2509494438613. The reversal of 2509494438551 is 1558344949052.

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

It is a cyclic number.

It is not a de Polignac number, because 2509494438551 - 2² = 2509494438547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2509494458551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1564931 + ... + 2732763.

It is an arithmetic number, because the mean of its divisors is an integer number (318838535178).

Almost surely, 2^{2509494438551} is an apocalyptic number.

2509494438551 is a deficient number, since it is larger than the sum of its proper divisors (41213842873).

2509494438551 is a wasteful number, since it uses less digits than its factorization.

2509494438551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203121.

The product of its (nonzero) digits is 31104000, while the sum is 59.

The spelling of 2509494438551 in words is "two trillion, five hundred nine billion, four hundred ninety-four million, four hundred thirty-eight thousand, five hundred fifty-one".