61489916173 has 32 divisors (see below), whose sum is σ = 76873144320. Its totient is φ = 48045312000.

The previous prime is 61489916167. The next prime is 61489916209. The reversal of 61489916173 is 37161998416.

It is not a de Polignac number, because 61489916173 - 2²¹ = 61487819021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61489916143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138853 + ... + 377173.

It is an arithmetic number, because the mean of its divisors is an integer number (2402285760).

Almost surely, 2^61489916173 is an apocalyptic number.

It is an amenable number.

61489916173 is a deficient number, since it is larger than the sum of its proper divisors (15383228147).

61489916173 is a wasteful number, since it uses less digits than its factorization.

61489916173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238429.

The product of its digits is 1959552, while the sum is 55.

The spelling of 61489916173 in words is "sixty-one billion, four hundred eighty-nine million, nine hundred sixteen thousand, one hundred seventy-three".