1825425978 has 16 divisors (see below), whose sum is σ = 3651745440. Its totient is φ = 608326416.

The previous prime is 1825425977. The next prime is 1825425989. The reversal of 1825425978 is 8795245281.

It is a self number, because there is not a number n which added to its sum of digits gives 1825425978.

It is not an unprimeable number, because it can be changed into a prime (1825425977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9025 + ... + 61092.

It is an arithmetic number, because the mean of its divisors is an integer number (228234090).

Almost surely, 2^1825425978 is an apocalyptic number.

1825425978 is an abundant number, since it is smaller than the sum of its proper divisors (1826319462).

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

1825425978 is a wasteful number, since it uses less digits than its factorization.

1825425978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74461.

The product of its digits is 1612800, while the sum is 51.

The square root of 1825425978 is about 42725.0041310706. The cubic root of 1825425978 is about 1222.1412673536.

The spelling of 1825425978 in words is "one billion, eight hundred twenty-five million, four hundred twenty-five thousand, nine hundred seventy-eight".