61788653901 has 32 divisors (see below), whose sum is σ = 99968682240. Its totient is φ = 37488225600.

The previous prime is 61788653897. The next prime is 61788653921. The reversal of 61788653901 is 10935688716.

61788653901 is a `hidden beast` number, since 6 + 178 + 86 + 5 + 390 + 1 = 666.

It is not a de Polignac number, because 61788653901 - 2² = 61788653897 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61788653921) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1214770 + ... + 1264611.

It is an arithmetic number, because the mean of its divisors is an integer number (3124021320).

Almost surely, 2^61788653901 is an apocalyptic number.

It is an amenable number.

61788653901 is a deficient number, since it is larger than the sum of its proper divisors (38180028339).

61788653901 is a wasteful number, since it uses less digits than its factorization.

61788653901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479474 (or 2479468 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 61788653901 in words is "sixty-one billion, seven hundred eighty-eight million, six hundred fifty-three thousand, nine hundred one".