1985547625 has 16 divisors (see below), whose sum is σ = 2479785984. Its totient is φ = 1587270000.

The previous prime is 1985547607. The next prime is 1985547673. The reversal of 1985547625 is 5267455891.

It is a happy number.

It is not a de Polignac number, because 1985547625 - 2¹¹ = 1985545577 is a prime.

It is a super-2 number, since 2×1985547625² = 7884798742286281250, which contains 22 as substring.

It is a Duffinian 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, 191320 + ... + 201430.

It is an arithmetic number, because the mean of its divisors is an integer number (154986624).

Almost surely, 2^1985547625 is an apocalyptic number.

It is an amenable number.

1985547625 is a deficient number, since it is larger than the sum of its proper divisors (494238359).

1985547625 is a wasteful number, since it uses less digits than its factorization.

1985547625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11697 (or 11687 counting only the distinct ones).

The product of its digits is 3024000, while the sum is 52.

The square root of 1985547625 is about 44559.4841195452. The cubic root of 1985547625 is about 1256.8789017937.

The spelling of 1985547625 in words is "one billion, nine hundred eighty-five million, five hundred forty-seven thousand, six hundred twenty-five".