1636421046 has 32 divisors (see below), whose sum is σ = 3526414080. Its totient is φ = 503254944.

The previous prime is 1636421041. The next prime is 1636421047. The reversal of 1636421046 is 6401246361.

It is a junction number, because it is equal to n+sod(n) for n = 1636420998 and 1636421016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636421041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193911 + ... + 202173.

It is an arithmetic number, because the mean of its divisors is an integer number (110200440).

Almost surely, 2^1636421046 is an apocalyptic number.

1636421046 is an abundant number, since it is smaller than the sum of its proper divisors (1889993034).

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

1636421046 is a wasteful number, since it uses less digits than its factorization.

1636421046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10820.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 1636421046 is about 40452.7013436680. The cubic root of 1636421046 is about 1178.4152445292.

The spelling of 1636421046 in words is "one billion, six hundred thirty-six million, four hundred twenty-one thousand, forty-six".