74736691043718 has 128 divisors (see below), whose sum is σ = 164602014990336. Its totient is φ = 22434163315200.

The previous prime is 74736691043683. The next prime is 74736691043723. The reversal of 74736691043718 is 81734019663747.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21070393221 + ... + 21070396767.

It is an arithmetic number, because the mean of its divisors is an integer number (1285953242112).

Almost surely, 2^{74736691043718} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74736691043718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82301007495168).

74736691043718 is an abundant number, since it is smaller than the sum of its proper divisors (89865323946618).

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

74736691043718 is a wasteful number, since it uses less digits than its factorization.

74736691043718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6898.

The product of its (nonzero) digits is 128024064, while the sum is 66.

The spelling of 74736691043718 in words is "seventy-four trillion, seven hundred thirty-six billion, six hundred ninety-one million, forty-three thousand, seven hundred eighteen".