1636546540 has 12 divisors (see below), whose sum is σ = 3436747776. Its totient is φ = 654618608.

The previous prime is 1636546537. The next prime is 1636546559. The reversal of 1636546540 is 456456361.

It is a junction number, because it is equal to n+sod(n) for n = 1636546493 and 1636546502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40913644 + ... + 40913683.

It is an arithmetic number, because the mean of its divisors is an integer number (286395648).

Almost surely, 2^1636546540 is an apocalyptic number.

1636546540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1636546540 is an abundant number, since it is smaller than the sum of its proper divisors (1800201236).

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

1636546540 is a wasteful number, since it uses less digits than its factorization.

1636546540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81827336 (or 81827334 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 1636546540 is about 40454.2524340767. The cubic root of 1636546540 is about 1178.4453672296.

The spelling of 1636546540 in words is "one billion, six hundred thirty-six million, five hundred forty-six thousand, five hundred forty".