744545609920 has 112 divisors (see below), whose sum is σ = 2091590074368. Its totient is φ = 247038151680.

The previous prime is 744545609891. The next prime is 744545609923. The reversal of 744545609920 is 29906545447.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×744545609920² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (744545609923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5291632 + ... + 5430511.

Almost surely, 2^744545609920 is an apocalyptic number.

744545609920 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

744545609920 is an abundant number, since it is smaller than the sum of its proper divisors (1347044464448).

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

744545609920 is a wasteful number, since it uses less digits than its factorization.

744545609920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10722198 (or 10722188 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 744545609920 in words is "seven hundred forty-four billion, five hundred forty-five million, six hundred nine thousand, nine hundred twenty".