78145806277837 has 4 divisors (see below), whose sum is σ = 78145907224000. Its totient is φ = 78145705331676.

The previous prime is 78145806277739. The next prime is 78145806277859. The reversal of 78145806277837 is 73877260854187.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78145806277837 - 2¹⁹ = 78145805753549 is a prime.

It is a super-2 number, since 2×78145806277837² (a number of 29 digits) contains 22 as substring.

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 78145806277837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78145806275837) 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, 49302837 + ... + 50863162.

It is an arithmetic number, because the mean of its divisors is an integer number (19536476806000).

Almost surely, 2^{78145806277837} is an apocalyptic number.

It is an amenable number.

78145806277837 is a deficient number, since it is larger than the sum of its proper divisors (100946163).

78145806277837 is a wasteful number, since it uses less digits than its factorization.

78145806277837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100946162.

The product of its (nonzero) digits is 885104640, while the sum is 73.

The spelling of 78145806277837 in words is "seventy-eight trillion, one hundred forty-five billion, eight hundred six million, two hundred seventy-seven thousand, eight hundred thirty-seven".