74401597738 has 16 divisors (see below), whose sum is σ = 120285040680. Its totient is φ = 34311243456.

The previous prime is 74401597733. The next prime is 74401597769. The reversal of 74401597738 is 83779510447.

It can be written as a sum of positive squares in 4 ways, for example, as 51185895049 + 23215702689 = 226243^2 + 152367^2 .

It is not an unprimeable number, because it can be changed into a prime (74401597733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1132245 + ... + 1196152.

Almost surely, 2^74401597738 is an apocalyptic number.

74401597738 is a deficient number, since it is larger than the sum of its proper divisors (45883442942).

74401597738 is a wasteful number, since it uses less digits than its factorization.

74401597738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329641.

The product of its (nonzero) digits is 5927040, while the sum is 55.

It can be divided in two parts, 744015 and 97738, that added together give a triangular number (841753 = T₁₂₉₇).

The spelling of 74401597738 in words is "seventy-four billion, four hundred one million, five hundred ninety-seven thousand, seven hundred thirty-eight".