83778319701 has 24 divisors (see below), whose sum is σ = 128214417240. Its totient is φ = 52532791296.

The previous prime is 83778319657. The next prime is 83778319721. The reversal of 83778319701 is 10791387738.

It is a happy number.

83778319701 is a `hidden beast` number, since 8 + 377 + 83 + 197 + 0 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 25897177476 + 57881142225 = 160926^2 + 240585^2 .

It is not a de Polignac number, because 83778319701 - 2⁶ = 83778319637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83778319721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61315 + ... + 413903.

It is an arithmetic number, because the mean of its divisors is an integer number (5342267385).

Almost surely, 2^83778319701 is an apocalyptic number.

It is an amenable number.

83778319701 is a deficient number, since it is larger than the sum of its proper divisors (44436097539).

83778319701 is a wasteful number, since it uses less digits than its factorization.

83778319701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354165 (or 354162 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 54.

The spelling of 83778319701 in words is "eighty-three billion, seven hundred seventy-eight million, three hundred nineteen thousand, seven hundred one".