1634861992 has 32 divisors (see below), whose sum is σ = 3229725600. Its totient is φ = 773682624.

The previous prime is 1634861951. The next prime is 1634861993. The reversal of 1634861992 is 2991684361.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1634861993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179943 + ... + 188809.

It is an arithmetic number, because the mean of its divisors is an integer number (100928925).

Almost surely, 2^1634861992 is an apocalyptic number.

It is an amenable number.

1634861992 is a deficient number, since it is larger than the sum of its proper divisors (1594863608).

1634861992 is a wasteful number, since it uses less digits than its factorization.

1634861992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105 (or 10101 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The square root of 1634861992 is about 40433.4266665589. The cubic root of 1634861992 is about 1178.0408916561.

The spelling of 1634861992 in words is "one billion, six hundred thirty-four million, eight hundred sixty-one thousand, nine hundred ninety-two".