61365951885 has 48 divisors (see below), whose sum is σ = 117900237312. Its totient is φ = 27148060800.

The previous prime is 61365951869. The next prime is 61365951887. The reversal of 61365951885 is 58815956316.

It is a happy number.

61365951885 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 61365951885 - 2⁴ = 61365951869 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61365951887) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1323846 + ... + 1369415.

It is an arithmetic number, because the mean of its divisors is an integer number (2456254944).

Almost surely, 2^61365951885 is an apocalyptic number.

It is an amenable number.

61365951885 is a deficient number, since it is larger than the sum of its proper divisors (56534285427).

61365951885 is a wasteful number, since it uses less digits than its factorization.

61365951885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2693314 (or 2693307 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 57.

The spelling of 61365951885 in words is "sixty-one billion, three hundred sixty-five million, nine hundred fifty-one thousand, eight hundred eighty-five".