61171770807 has 40 divisors (see below), whose sum is σ = 108974992896. Its totient is φ = 33435494928.

The previous prime is 61171770773. The next prime is 61171770809. The reversal of 61171770807 is 70807717116.

It is not a de Polignac number, because 61171770807 - 2²⁴ = 61154993591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61171770809) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2332323 + ... + 2358404.

Almost surely, 2^61171770807 is an apocalyptic number.

61171770807 is a deficient number, since it is larger than the sum of its proper divisors (47803222089).

61171770807 is a wasteful number, since it uses less digits than its factorization.

61171770807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4690769 (or 4690760 counting only the distinct ones).

The product of its (nonzero) digits is 115248, while the sum is 45.

The spelling of 61171770807 in words is "sixty-one billion, one hundred seventy-one million, seven hundred seventy thousand, eight hundred seven".