7662538161 has 6 divisors (see below), whose sum is σ = 11068110690. Its totient is φ = 5108358768.

The previous prime is 7662538151. The next prime is 7662538187. The reversal of 7662538161 is 1618352667.

7662538161 is a `hidden beast` number, since 7 + 6 + 625 + 3 + 8 + 16 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7392560400 + 269977761 = 85980^2 + 16431^2 .

It is not a de Polignac number, because 7662538161 - 2⁶ = 7662538097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7662538111) 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, 425696556 + ... + 425696573.

It is an arithmetic number, because the mean of its divisors is an integer number (1844685115).

Almost surely, 2^7662538161 is an apocalyptic number.

It is an amenable number.

7662538161 is a deficient number, since it is larger than the sum of its proper divisors (3405572529).

7662538161 is a wasteful number, since it uses less digits than its factorization.

7662538161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851393135 (or 851393132 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 7662538161 is about 87535.9249736929. The cubic root of 7662538161 is about 1971.4732262074.

The spelling of 7662538161 in words is "seven billion, six hundred sixty-two million, five hundred thirty-eight thousand, one hundred sixty-one".