74875641645 has 64 divisors (see below), whose sum is σ = 137570549760. Its totient is φ = 34065439488.

The previous prime is 74875641641. The next prime is 74875641661. The reversal of 74875641645 is 54614657847.

It is not a de Polignac number, because 74875641645 - 2² = 74875641641 is a prime.

It is a super-3 number, since 3×74875641645³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74875641641) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33440436 + ... + 33442674.

It is an arithmetic number, because the mean of its divisors is an integer number (2149539840).

Almost surely, 2^74875641645 is an apocalyptic number.

It is an amenable number.

74875641645 is a deficient number, since it is larger than the sum of its proper divisors (62694908115).

74875641645 is a wasteful number, since it uses less digits than its factorization.

74875641645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634.

The product of its digits is 22579200, while the sum is 57.

The spelling of 74875641645 in words is "seventy-four billion, eight hundred seventy-five million, six hundred forty-one thousand, six hundred forty-five".