101780517438445 has 16 divisors (see below), whose sum is σ = 129321379495728. Its totient is φ = 76634593530880.

The previous prime is 101780517438443. The next prime is 101780517438449. The reversal of 101780517438445 is 544834715087101.

It can be written as a sum of positive squares in 8 ways, for example, as 7559541289444 + 94220976149001 = 2749462^2 + 9706749^2 .

It is not a de Polignac number, because 101780517438445 - 2¹ = 101780517438443 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101780517438445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101780517438443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64403835 + ... + 65965255.

It is an arithmetic number, because the mean of its divisors is an integer number (8082586218483).

Almost surely, 2^{101780517438445} is an apocalyptic number.

It is an amenable number.

101780517438445 is a deficient number, since it is larger than the sum of its proper divisors (27540862057283).

101780517438445 is a wasteful number, since it uses less digits than its factorization.

101780517438445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328320.

The product of its (nonzero) digits is 15052800, while the sum is 58.

The spelling of 101780517438445 in words is "one hundred one trillion, seven hundred eighty billion, five hundred seventeen million, four hundred thirty-eight thousand, four hundred forty-five".