74688153507640 has 128 divisors (see below), whose sum is σ = 174492800294400. Its totient is φ = 28741953607680.

The previous prime is 74688153507623. The next prime is 74688153507713. The reversal of 74688153507640 is 4670535188647.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6420363264 + ... + 6420374896.

It is an arithmetic number, because the mean of its divisors is an integer number (1363225002300).

Almost surely, 2^{74688153507640} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74688153507640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87246400147200).

74688153507640 is an abundant number, since it is smaller than the sum of its proper divisors (99804646786760).

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

74688153507640 is an equidigital number, since it uses as much as digits as its factorization.

74688153507640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12194 (or 11844 counting only the distinct ones).

The product of its (nonzero) digits is 135475200, while the sum is 64.

The spelling of 74688153507640 in words is "seventy-four trillion, six hundred eighty-eight billion, one hundred fifty-three million, five hundred seven thousand, six hundred forty".