61798555971 has 12 divisors (see below), whose sum is σ = 91163827872. Its totient is φ = 40322461776.

The previous prime is 61798555967. The next prime is 61798556011. The reversal of 61798555971 is 17955589716.

61798555971 is a `hidden beast` number, since 6 + 1 + 7 + 9 + 8 + 5 + 559 + 71 = 666.

61798555971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61798555971 - 2² = 61798555967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61798555899 and 61798555908.

It is not an unprimeable number, because it can be changed into a prime (61798555901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73047516 + ... + 73048361.

It is an arithmetic number, because the mean of its divisors is an integer number (7596985656).

Almost surely, 2^61798555971 is an apocalyptic number.

61798555971 is a deficient number, since it is larger than the sum of its proper divisors (29365271901).

61798555971 is a wasteful number, since it uses less digits than its factorization.

61798555971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146095930 (or 146095927 counting only the distinct ones).

The product of its digits is 23814000, while the sum is 63.

The spelling of 61798555971 in words is "sixty-one billion, seven hundred ninety-eight million, five hundred fifty-five thousand, nine hundred seventy-one".