1974644125740 has 720 divisors, whose sum is σ = 7349326006176. Its totient is φ = 440873072640.

The previous prime is 1974644125697. The next prime is 1974644125757. The reversal of 1974644125740 is 475214464791.

It is a happy number.

1974644125740 is a `hidden beast` number, since 1 + 9 + 7 + 4 + 64 + 4 + 1 + 2 + 574 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 2107410552 + ... + 2107411488.

Almost surely, 2^{1974644125740} is an apocalyptic number.

1974644125740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1974644125740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3674663003088).

1974644125740 is an abundant number, since it is smaller than the sum of its proper divisors (5374681880436).

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

1974644125740 is a wasteful number, since it uses less digits than its factorization.

1974644125740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820 (or 1798 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 1974644125740 in words is "one trillion, nine hundred seventy-four billion, six hundred forty-four million, one hundred twenty-five thousand, seven hundred forty".