45638821643 has 32 divisors (see below), whose sum is σ = 48231106560. Its totient is φ = 43132734720.

The previous prime is 45638821633. The next prime is 45638821667. The reversal of 45638821643 is 34612883654.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 45638821643 - 2³² = 41343854347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45638821591 and 45638821600.

It is not an unprimeable number, because it can be changed into a prime (45638821633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161267780 + ... + 161268062.

It is an arithmetic number, because the mean of its divisors is an integer number (1507222080).

Almost surely, 2^45638821643 is an apocalyptic number.

45638821643 is a deficient number, since it is larger than the sum of its proper divisors (2592284917).

45638821643 is a wasteful number, since it uses less digits than its factorization.

45638821643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899.

The product of its digits is 3317760, while the sum is 50.

The spelling of 45638821643 in words is "forty-five billion, six hundred thirty-eight million, eight hundred twenty-one thousand, six hundred forty-three".