374138663440 has 80 divisors (see below), whose sum is σ = 882987056640. Its totient is φ = 147403307520.

The previous prime is 374138663389. The next prime is 374138663447. The reversal of 374138663440 is 44366831473.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (374138663447) 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, 5869822 + ... + 5933218.

It is an arithmetic number, because the mean of its divisors is an integer number (11037338208).

Almost surely, 2^374138663440 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 374138663440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441493528320).

374138663440 is an abundant number, since it is smaller than the sum of its proper divisors (508848393200).

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

374138663440 is a wasteful number, since it uses less digits than its factorization.

374138663440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64520 (or 64514 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 49.

The spelling of 374138663440 in words is "three hundred seventy-four billion, one hundred thirty-eight million, six hundred sixty-three thousand, four hundred forty".