1623542164 has 12 divisors (see below), whose sum is σ = 2842682164. Its totient is φ = 811347264.

The previous prime is 1623542131. The next prime is 1623542171. The reversal of 1623542164 is 4612453261.

It can be written as a sum of positive squares in 2 ways, for example, as 1086229764 + 537312400 = 32958^2 + 23180^2 .

It is a congruent number.

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, 97257 + ... + 112720.

Almost surely, 2^1623542164 is an apocalyptic number.

It is an amenable number.

1623542164 is a deficient number, since it is larger than the sum of its proper divisors (1219140000).

1623542164 is a wasteful number, since it uses less digits than its factorization.

1623542164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211914 (or 211912 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 1623542164 is about 40293.2024540120. The cubic root of 1623542164 is about 1175.3156632506.

The spelling of 1623542164 in words is "one billion, six hundred twenty-three million, five hundred forty-two thousand, one hundred sixty-four".