61794040947 has 8 divisors (see below), whose sum is σ = 82660433856. Its totient is φ = 41061837672.

The previous prime is 61794040933. The next prime is 61794041009. The reversal of 61794040947 is 74904049716.

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

It is not a de Polignac number, because 61794040947 - 2⁸ = 61794040691 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 61794040947.

It is not an unprimeable number, because it can be changed into a prime (61794040927) 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, 33546333 + ... + 33548174.

It is an arithmetic number, because the mean of its divisors is an integer number (10332554232).

Almost surely, 2^61794040947 is an apocalyptic number.

61794040947 is a deficient number, since it is larger than the sum of its proper divisors (20866392909).

61794040947 is a wasteful number, since it uses less digits than its factorization.

61794040947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67094817.

The product of its (nonzero) digits is 1524096, while the sum is 51.

The spelling of 61794040947 in words is "sixty-one billion, seven hundred ninety-four million, forty thousand, nine hundred forty-seven".