16142973025 has 9 divisors (see below), whose sum is σ = 20018074323. Its totient is φ = 12913870200.

The previous prime is 16142973023. The next prime is 16142973043. The reversal of 16142973025 is 52037924161.

It is a happy number.

The square root of 16142973025 is 127055.

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

It can be written as a sum of positive squares in only one way, i.e., 5811470289 + 10331502736 = 76233^2 + 101644^2 .

It is not a de Polignac number, because 16142973025 - 2¹ = 16142973023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16142973023) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 622570 + ... + 647980.

Almost surely, 2^16142973025 is an apocalyptic number.

16142973025 is the 127055-th square number.

16142973025 is the 63528-th centered octagonal number.

It is an amenable number.

16142973025 is a deficient number, since it is larger than the sum of its proper divisors (3875101298).

16142973025 is an frugal number, since it uses more digits than its factorization.

16142973025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50832 (or 25416 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 16142973025 in words is "sixteen billion, one hundred forty-two million, nine hundred seventy-three thousand, twenty-five".