74405391732736 has 117 divisors (see below), whose sum is σ = 151712654854369. Its totient is φ = 36486404784128.

The previous prime is 74405391732719. The next prime is 74405391732811. The reversal of 74405391732736 is 63723719350447.

The square root of 74405391732736 is 8625856.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 53638632345600 + 20766759387136 = 7323840^2 + 4557056^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 29258902281 + ... + 29258904823.

Almost surely, 2^{74405391732736} is an apocalyptic number.

74405391732736 is the 8625856-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74405391732736

74405391732736 is an abundant number, since it is smaller than the sum of its proper divisors (77307263121633).

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

74405391732736 is an frugal number, since it uses more digits than its factorization.

74405391732736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5216 (or 2598 counting only the distinct ones).

The product of its (nonzero) digits is 80015040, while the sum is 61.

The spelling of 74405391732736 in words is "seventy-four trillion, four hundred five billion, three hundred ninety-one million, seven hundred thirty-two thousand, seven hundred thirty-six".