1971878825 has 36 divisors (see below), whose sum is σ = 2892649680. Its totient is φ = 1329179040.

The previous prime is 1971878801. The next prime is 1971878837. The reversal of 1971878825 is 5288781791.

1971878825 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1971878825 - 2⁶ = 1971878761 is a prime.

It is a super-2 number, since 2×1971878825² = 7776612200966761250, which contains 22 as substring.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 58634 + ... + 85916.

It is an arithmetic number, because the mean of its divisors is an integer number (80351380).

Almost surely, 2^1971878825 is an apocalyptic number.

It is an amenable number.

1971878825 is a deficient number, since it is larger than the sum of its proper divisors (920770855).

1971878825 is a wasteful number, since it uses less digits than its factorization.

1971878825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27366 (or 27354 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 56.

The square root of 1971878825 is about 44405.8422395072. The cubic root of 1971878825 is about 1253.9880786513.

The spelling of 1971878825 in words is "one billion, nine hundred seventy-one million, eight hundred seventy-eight thousand, eight hundred twenty-five".