1974646544 has 40 divisors (see below), whose sum is σ = 4134365592. Its totient is φ = 908236800.

The previous prime is 1974646523. The next prime is 1974646547. The reversal of 1974646544 is 4456464791.

It can be written as a sum of positive squares in 4 ways, for example, as 1134342400 + 840304144 = 33680^2 + 28988^2 .

It is a super-2 number, since 2×1974646544² = 7798457947462287872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1974646492 and 1974646501.

It is not an unprimeable number, because it can be changed into a prime (1974646547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44744 + ... + 77144.

Almost surely, 2^1974646544 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 1974646544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2067182796).

1974646544 is an abundant number, since it is smaller than the sum of its proper divisors (2159719048).

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

1974646544 is a wasteful number, since it uses less digits than its factorization.

1974646544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32715 (or 32709 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 50.

The square root of 1974646544 is about 44436.9952179487. The cubic root of 1974646544 is about 1254.5745014476.

The spelling of 1974646544 in words is "one billion, nine hundred seventy-four million, six hundred forty-six thousand, five hundred forty-four".