61394432841 has 243 divisors, whose sum is σ = 118185499341. Its totient is φ = 31791036816.

The previous prime is 61394432833. The next prime is 61394432857. The reversal of 61394432841 is 14823449316.

The square root of 61394432841 is 247779.

It is a perfect power (a square), and thus also a powerful number.

61394432841 is a `hidden beast` number, since 6 + 139 + 4 + 432 + 84 + 1 = 666.

61394432841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (243).

It is not a de Polignac number, because 61394432841 - 2³ = 61394432833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61394432821) by changing a digit.

It is a polite number, since it can be written in 242 ways as a sum of consecutive naturals, for example, 2669323156 + ... + 2669323178.

Almost surely, 2^61394432841 is an apocalyptic number.

61394432841 is the 247779-th square number.

61394432841 is the 123890-th centered octagonal number.

It is an amenable number.

61394432841 is a deficient number, since it is larger than the sum of its proper divisors (56791066500).

61394432841 is an frugal number, since it uses more digits than its factorization.

61394432841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 52 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The spelling of 61394432841 in words is "sixty-one billion, three hundred ninety-four million, four hundred thirty-two thousand, eight hundred forty-one".