61376723172534 has 384 divisors, whose sum is σ = 164775497564160. Its totient is φ = 14874795936000.

The previous prime is 61376723172517. The next prime is 61376723172547. The reversal of 61376723172534 is 43527132767316.

It is a Harshad number since it is a multiple of its sum of digits (57).

Its product of digits (26671680) is a multiple of the sum of its prime factors (9408).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7493186379 + ... + 7493194569.

It is an arithmetic number, because the mean of its divisors is an integer number (429102858240).

Almost surely, 2^{61376723172534} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61376723172534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82387748782080).

61376723172534 is an abundant number, since it is smaller than the sum of its proper divisors (103398774391626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61376723172534 is a wasteful number, since it uses less digits than its factorization.

61376723172534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9408 (or 9397 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 57.

The spelling of 61376723172534 in words is "sixty-one trillion, three hundred seventy-six billion, seven hundred twenty-three million, one hundred seventy-two thousand, five hundred thirty-four".