78223044037 has 4 divisors (see below), whose sum is σ = 80042184640. Its totient is φ = 76403903436.

The previous prime is 78223044019. The next prime is 78223044071. The reversal of 78223044037 is 73044032287.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73044032287 = 383 ⋅190715489.

It is a cyclic number.

It is not a de Polignac number, because 78223044037 - 2³⁵ = 43863305669 is a prime.

It is a super-2 number, since 2×78223044037² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78223044007) 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, 909570237 + ... + 909570322.

It is an arithmetic number, because the mean of its divisors is an integer number (20010546160).

Almost surely, 2^78223044037 is an apocalyptic number.

It is an amenable number.

78223044037 is a deficient number, since it is larger than the sum of its proper divisors (1819140603).

78223044037 is a wasteful number, since it uses less digits than its factorization.

78223044037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819140602.

The product of its (nonzero) digits is 225792, while the sum is 40.

The spelling of 78223044037 in words is "seventy-eight billion, two hundred twenty-three million, forty-four thousand, thirty-seven".