3745478125648 has 80 divisors (see below), whose sum is σ = 8419460941440. Its totient is φ = 1581010195968.

The previous prime is 3745478125633. The next prime is 3745478125663. The reversal of 3745478125648 is 8465218745473.

It is an interprime number because it is at equal distance from previous prime (3745478125633) and next prime (3745478125663).

It is a self number, because there is not a number n which added to its sum of digits gives 3745478125648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1169938 + ... + 2976526.

It is an arithmetic number, because the mean of its divisors is an integer number (105243261768).

Almost surely, 2^{3745478125648} 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 3745478125648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4209730470720).

3745478125648 is an abundant number, since it is smaller than the sum of its proper divisors (4673982815792).

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

3745478125648 is a wasteful number, since it uses less digits than its factorization.

3745478125648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806884 (or 1806878 counting only the distinct ones).

The product of its digits is 180633600, while the sum is 64.

The spelling of 3745478125648 in words is "three trillion, seven hundred forty-five billion, four hundred seventy-eight million, one hundred twenty-five thousand, six hundred forty-eight".