83778000133 has 4 divisors (see below), whose sum is σ = 83817132588. Its totient is φ = 83738867680.

The previous prime is 83778000109. The next prime is 83778000149. The reversal of 83778000133 is 33100087738.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37101693924 + 46676306209 = 192618^2 + 216047^2 .

It is a cyclic number.

It is not a de Polignac number, because 83778000133 - 2⁹ = 83777999621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83778000193) 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, 19563016 + ... + 19567297.

It is an arithmetic number, because the mean of its divisors is an integer number (20954283147).

Almost surely, 2^83778000133 is an apocalyptic number.

It is an amenable number.

83778000133 is a deficient number, since it is larger than the sum of its proper divisors (39132455).

83778000133 is a wasteful number, since it uses less digits than its factorization.

83778000133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39132454.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 83778000133 in words is "eighty-three billion, seven hundred seventy-eight million, one hundred thirty-three", and thus it is an aban number.