77212047938 has 8 divisors (see below), whose sum is σ = 115830054540. Its totient is φ = 38602029760.

The previous prime is 77212047889. The next prime is 77212047953. The reversal of 77212047938 is 83974021277.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 76570084369 + 641963569 = 276713^2 + 25337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1972883 + ... + 2011638.

Almost surely, 2^77212047938 is an apocalyptic number.

77212047938 is a deficient number, since it is larger than the sum of its proper divisors (38618006602).

77212047938 is a wasteful number, since it uses less digits than its factorization.

77212047938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3994212.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 77212047938 in words is "seventy-seven billion, two hundred twelve million, forty-seven thousand, nine hundred thirty-eight".