61781462179 has 8 divisors (see below), whose sum is σ = 62111994480. Its totient is φ = 61451037696.

The previous prime is 61781462177. The next prime is 61781462243. The reversal of 61781462179 is 97126418716.

It is a happy number.

61781462179 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61781462179 - 2¹ = 61781462177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61781462177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1294167 + ... + 1341055.

It is an arithmetic number, because the mean of its divisors is an integer number (7763999310).

Almost surely, 2^61781462179 is an apocalyptic number.

61781462179 is a deficient number, since it is larger than the sum of its proper divisors (330532301).

61781462179 is a wasteful number, since it uses less digits than its factorization.

61781462179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53909.

The product of its digits is 1016064, while the sum is 52.

The spelling of 61781462179 in words is "sixty-one billion, seven hundred eighty-one million, four hundred sixty-two thousand, one hundred seventy-nine".