83781148056049 has 4 divisors (see below), whose sum is σ = 86670153161460. Its totient is φ = 80892142950640.

The previous prime is 83781148056031. The next prime is 83781148056103. The reversal of 83781148056049 is 94065084118738.

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 19384647840000 + 64396500216049 = 4402800^2 + 8024743^2 .

It is a cyclic number.

It is not a de Polignac number, because 83781148056049 - 2¹⁵ = 83781148023281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83781148056019) 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, 1444502552662 + ... + 1444502552719.

It is an arithmetic number, because the mean of its divisors is an integer number (21667538290365).

Almost surely, 2^{83781148056049} is an apocalyptic number.

It is an amenable number.

83781148056049 is a deficient number, since it is larger than the sum of its proper divisors (2889005105411).

83781148056049 is a wasteful number, since it uses less digits than its factorization.

83781148056049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2889005105410.

The product of its (nonzero) digits is 46448640, while the sum is 64.

The spelling of 83781148056049 in words is "eighty-three trillion, seven hundred eighty-one billion, one hundred forty-eight million, fifty-six thousand, forty-nine".