7761122138 has 16 divisors (see below), whose sum is σ = 14514306624. Its totient is φ = 3023813760.

The previous prime is 7761122119. The next prime is 7761122141. The reversal of 7761122138 is 8312211677.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25198295 + ... + 25198602.

It is an arithmetic number, because the mean of its divisors is an integer number (907144164).

Almost surely, 2^7761122138 is an apocalyptic number.

7761122138 is a deficient number, since it is larger than the sum of its proper divisors (6753184486).

7761122138 is a wasteful number, since it uses less digits than its factorization.

7761122138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50396917.

The product of its digits is 28224, while the sum is 38.

The square root of 7761122138 is about 88097.2311596681. The cubic root of 7761122138 is about 1979.8920236666.

The spelling of 7761122138 in words is "seven billion, seven hundred sixty-one million, one hundred twenty-two thousand, one hundred thirty-eight".