61047066621 has 16 divisors (see below), whose sum is σ = 81948838400. Its totient is φ = 40422389040.

The previous prime is 61047066581. The next prime is 61047066637. The reversal of 61047066621 is 12666074016.

It is not a de Polignac number, because 61047066621 - 2¹⁴ = 61047050237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61047066621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61047066721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251346 + ... + 430428.

It is an arithmetic number, because the mean of its divisors is an integer number (5121802400).

Almost surely, 2^61047066621 is an apocalyptic number.

It is an amenable number.

61047066621 is a deficient number, since it is larger than the sum of its proper divisors (20901771779).

61047066621 is a wasteful number, since it uses less digits than its factorization.

61047066621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179856.

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 61047066621 in words is "sixty-one billion, forty-seven million, sixty-six thousand, six hundred twenty-one".