74436863401 has 4 divisors (see below), whose sum is σ = 74570502852. Its totient is φ = 74303223952.

The previous prime is 74436863399. The next prime is 74436863411. The reversal of 74436863401 is 10436863447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10436863447 = 29 ⋅359891843.

It can be written as a sum of positive squares in 2 ways, for example, as 46839347776 + 27597515625 = 216424^2 + 166125^2 .

It is a cyclic number.

It is not a de Polignac number, because 74436863401 - 2¹ = 74436863399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74436863411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66818890 + ... + 66820003.

It is an arithmetic number, because the mean of its divisors is an integer number (18642625713).

Almost surely, 2^74436863401 is an apocalyptic number.

It is an amenable number.

74436863401 is a deficient number, since it is larger than the sum of its proper divisors (133639451).

74436863401 is a wasteful number, since it uses less digits than its factorization.

74436863401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133639450.

The product of its (nonzero) digits is 1161216, while the sum is 46.

Adding to 74436863401 its sum of digits (46), we get a palindrome (74436863447).

The spelling of 74436863401 in words is "seventy-four billion, four hundred thirty-six million, eight hundred sixty-three thousand, four hundred one".