77673050437 has 4 divisors (see below), whose sum is σ = 78385647340. Its totient is φ = 76960453536.

The previous prime is 77673050407. The next prime is 77673050447. The reversal of 77673050437 is 73405037677.

It is a happy number.

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 33368694241 + 44304356196 = 182671^2 + 210486^2 .

It is a cyclic number.

It is not a de Polignac number, because 77673050437 - 2⁷ = 77673050309 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 (77673050407) 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, 356298288 + ... + 356298505.

It is an arithmetic number, because the mean of its divisors is an integer number (19596411835).

Almost surely, 2^77673050437 is an apocalyptic number.

It is an amenable number.

77673050437 is a deficient number, since it is larger than the sum of its proper divisors (712596903).

77673050437 is a wasteful number, since it uses less digits than its factorization.

77673050437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712596902.

The product of its (nonzero) digits is 2593080, while the sum is 49.

The spelling of 77673050437 in words is "seventy-seven billion, six hundred seventy-three million, fifty thousand, four hundred thirty-seven".