2506681551 has 8 divisors (see below), whose sum is σ = 3646082304. Its totient is φ = 1519200920.

The previous prime is 2506681547. The next prime is 2506681559. The reversal of 2506681551 is 1551866052.

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 2506681551 - 2² = 2506681547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506681559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37979991 + ... + 37980056.

It is an arithmetic number, because the mean of its divisors is an integer number (455760288).

Almost surely, 2^2506681551 is an apocalyptic number.

2506681551 is a deficient number, since it is larger than the sum of its proper divisors (1139400753).

2506681551 is a wasteful number, since it uses less digits than its factorization.

2506681551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75960061.

The product of its (nonzero) digits is 72000, while the sum is 39.

The square root of 2506681551 is about 50066.7709264338. The cubic root of 2506681551 is about 1358.4168340537.

The spelling of 2506681551 in words is "two billion, five hundred six million, six hundred eighty-one thousand, five hundred fifty-one".