1974539263489 has 27 divisors (see below), whose sum is σ = 2256962166153. Its totient is φ = 1726419075264.

The previous prime is 1974539263441. The next prime is 1974539263537. The reversal of 1974539263489 is 9843629354791.

The square root of 1974539263489 is 1405183.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1974539263441) and next prime (1974539263537).

It can be written as a sum of positive squares in 4 ways, for example, as 64869543025 + 1909669720464 = 254695^2 + 1381908^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1974539263489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1974539263789) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 347077357 + ... + 347083045.

It is an arithmetic number, because the mean of its divisors is an integer number (83591191339).

Almost surely, 2^{1974539263489} is an apocalyptic number.

1974539263489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1974539263489 is the 1405183-rd square number.

1974539263489 is the 702592-nd centered octagonal number.

It is an amenable number.

1974539263489 is a deficient number, since it is larger than the sum of its proper divisors (282422902664).

1974539263489 is an frugal number, since it uses more digits than its factorization.

1974539263489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11442 (or 5721 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 70.

The spelling of 1974539263489 in words is "one trillion, nine hundred seventy-four billion, five hundred thirty-nine million, two hundred sixty-three thousand, four hundred eighty-nine".