2506694551 has 2 divisors, whose sum is σ = 2506694552. Its totient is φ = 2506694550.

The previous prime is 2506694543. The next prime is 2506694579. The reversal of 2506694551 is 1554966052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2506694551 - 2³ = 2506694543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2506694498 and 2506694507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2506694051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1253347275 + 1253347276.

It is an arithmetic number, because the mean of its divisors is an integer number (1253347276).

Almost surely, 2^2506694551 is an apocalyptic number.

2506694551 is a deficient number, since it is larger than the sum of its proper divisors (1).

2506694551 is an equidigital number, since it uses as much as digits as its factorization.

2506694551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 43.

The square root of 2506694551 is about 50066.9007528926. The cubic root of 2506694551 is about 1358.4191823627.

The spelling of 2506694551 in words is "two billion, five hundred six million, six hundred ninety-four thousand, five hundred fifty-one".