745491887840 has 72 divisors (see below), whose sum is σ = 2048771477592. Its totient is φ = 255597216000.

The previous prime is 745491887827. The next prime is 745491887873. The reversal of 745491887840 is 48788194547.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47536286 + ... + 47551965.

It is an arithmetic number, because the mean of its divisors is an integer number (28455159411).

Almost surely, 2^745491887840 is an apocalyptic number.

745491887840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

745491887840 is an abundant number, since it is smaller than the sum of its proper divisors (1303279589752).

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

745491887840 is a wasteful number, since it uses less digits than its factorization.

745491887840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95088280 (or 95088265 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 65.

The spelling of 745491887840 in words is "seven hundred forty-five billion, four hundred ninety-one million, eight hundred eighty-seven thousand, eight hundred forty".