76778274442 has 4 divisors (see below), whose sum is σ = 115167411666. Its totient is φ = 38389137220.

The previous prime is 76778274439. The next prime is 76778274473. The reversal of 76778274442 is 24447287767.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 65895403401 + 10882871041 = 256701^2 + 104321^2 .

It is a super-2 number, since 2×76778274442² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19194568609 + ... + 19194568612.

Almost surely, 2^76778274442 is an apocalyptic number.

76778274442 is a deficient number, since it is larger than the sum of its proper divisors (38389137224).

76778274442 is a wasteful number, since it uses less digits than its factorization.

76778274442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38389137223.

The product of its digits is 29503488, while the sum is 58.

The spelling of 76778274442 in words is "seventy-six billion, seven hundred seventy-eight million, two hundred seventy-four thousand, four hundred forty-two".