13780440373477 has 4 divisors (see below), whose sum is σ = 13782534353676. Its totient is φ = 13778346393280.

The previous prime is 13780440373471. The next prime is 13780440373481. The reversal of 13780440373477 is 77437304408731.

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 5121345515521 + 8659094857956 = 2263039^2 + 2942634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13780440373477 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 (13780440373471) 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, 1046980228 + ... + 1046993389.

It is an arithmetic number, because the mean of its divisors is an integer number (3445633588419).

Almost surely, 2^{13780440373477} is an apocalyptic number.

It is an amenable number.

13780440373477 is a deficient number, since it is larger than the sum of its proper divisors (2093980199).

13780440373477 is an equidigital number, since it uses as much as digits as its factorization.

13780440373477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093980198.

The product of its (nonzero) digits is 33191424, while the sum is 58.

The spelling of 13780440373477 in words is "thirteen trillion, seven hundred eighty billion, four hundred forty million, three hundred seventy-three thousand, four hundred seventy-seven".