74400665550 has 48 divisors (see below), whose sum is σ = 184549942512. Its totient is φ = 19836275200.

The previous prime is 74400665543. The next prime is 74400665569. The reversal of 74400665550 is 5556600447.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 761062 + ... + 853238.

It is an arithmetic number, because the mean of its divisors is an integer number (3844790469).

Almost surely, 2^74400665550 is an apocalyptic number.

74400665550 is an abundant number, since it is smaller than the sum of its proper divisors (110149276962).

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

74400665550 is a wasteful number, since it uses less digits than its factorization.

74400665550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97573 (or 97568 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 42.

The spelling of 74400665550 in words is "seventy-four billion, four hundred million, six hundred sixty-five thousand, five hundred fifty".