1635145672 has 16 divisors (see below), whose sum is σ = 3071352240. Its totient is φ = 816118416.

The previous prime is 1635145669. The next prime is 1635145679. The reversal of 1635145672 is 2765415361.

It is not an unprimeable number, because it can be changed into a prime (1635145679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177018 + ... + 186025.

It is an arithmetic number, because the mean of its divisors is an integer number (191959515).

Almost surely, 2^1635145672 is an apocalyptic number.

It is an amenable number.

1635145672 is a deficient number, since it is larger than the sum of its proper divisors (1436206568).

1635145672 is a wasteful number, since it uses less digits than its factorization.

1635145672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363612 (or 363608 counting only the distinct ones).

The product of its digits is 151200, while the sum is 40.

The square root of 1635145672 is about 40436.9345030011. The cubic root of 1635145672 is about 1178.1090252996.

The spelling of 1635145672 in words is "one billion, six hundred thirty-five million, one hundred forty-five thousand, six hundred seventy-two".