74037865801 has 9 divisors (see below), whose sum is σ = 78145143303. Its totient is φ = 70136238240.

The previous prime is 74037865777. The next prime is 74037865807. The reversal of 74037865801 is 10856873047.

It is a happy number.

The square root of 74037865801 is 272099.

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., 835152201 + 73202713600 = 28899^2 + 270560^2 .

It is not a de Polignac number, because 74037865801 - 2⁹ = 74037865289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74037865807) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5162721 + ... + 5177041.

Almost surely, 2^74037865801 is an apocalyptic number.

74037865801 is the 272099-th square number.

74037865801 is the 136050-th centered octagonal number.

It is an amenable number.

74037865801 is a deficient number, since it is larger than the sum of its proper divisors (4107277502).

74037865801 is an frugal number, since it uses more digits than its factorization.

74037865801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28680 (or 14340 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

Multiplying 74037865801 by its sum of digits (49), we get a square (3627855424249 = 1904693²).

The spelling of 74037865801 in words is "seventy-four billion, thirty-seven million, eight hundred sixty-five thousand, eight hundred one".