2506107861 has 6 divisors (see below), whose sum is σ = 3619933590. Its totient is φ = 1670738568.

The previous prime is 2506107839. The next prime is 2506107907. The reversal of 2506107861 is 1687016052.

It can be written as a sum of positive squares in only one way, i.e., 1500012900 + 1006094961 = 38730^2 + 31719^2 .

It is not a de Polignac number, because 2506107861 - 2¹⁵ = 2506075093 is a prime.

It is a super-2 number, since 2×2506107861² = 12561153221931990642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506106861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139228206 + ... + 139228223.

It is an arithmetic number, because the mean of its divisors is an integer number (603322265).

Almost surely, 2^2506107861 is an apocalyptic number.

It is an amenable number.

2506107861 is a deficient number, since it is larger than the sum of its proper divisors (1113825729).

2506107861 is a wasteful number, since it uses less digits than its factorization.

2506107861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278456435 (or 278456432 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 2506107861 is about 50061.0413495365. The cubic root of 2506107861 is about 1358.3131950929.

The spelling of 2506107861 in words is "two billion, five hundred six million, one hundred seven thousand, eight hundred sixty-one".