61117778395 has 16 divisors (see below), whose sum is σ = 77756595840. Its totient is φ = 45958201344.

The previous prime is 61117778317. The next prime is 61117778461. The reversal of 61117778395 is 59387771116.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61117778395 - 2¹¹ = 61117776347 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402147 + ... + 532876.

It is an arithmetic number, because the mean of its divisors is an integer number (4859787240).

Almost surely, 2^61117778395 is an apocalyptic number.

61117778395 is a deficient number, since it is larger than the sum of its proper divisors (16638817445).

61117778395 is a wasteful number, since it uses less digits than its factorization.

61117778395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935814.

The product of its digits is 2222640, while the sum is 55.

The spelling of 61117778395 in words is "sixty-one billion, one hundred seventeen million, seven hundred seventy-eight thousand, three hundred ninety-five".