1981472375 has 16 divisors (see below), whose sum is σ = 2475310656. Its totient is φ = 1583618400.

The previous prime is 1981472347. The next prime is 1981472393. The reversal of 1981472375 is 5732741891.

It is a de Polignac number, because none of the positive numbers 2^k-1981472375 is a prime.

It is a super-3 number, since 3×1981472375³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

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, 129374 + ... + 143876.

It is an arithmetic number, because the mean of its divisors is an integer number (154706916).

Almost surely, 2^1981472375 is an apocalyptic number.

1981472375 is a deficient number, since it is larger than the sum of its proper divisors (493838281).

1981472375 is a wasteful number, since it uses less digits than its factorization.

1981472375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15611 (or 15601 counting only the distinct ones).

The product of its digits is 423360, while the sum is 47.

The square root of 1981472375 is about 44513.7324316890. The cubic root of 1981472375 is about 1256.0184164254.

The spelling of 1981472375 in words is "one billion, nine hundred eighty-one million, four hundred seventy-two thousand, three hundred seventy-five".