77728703311678 has 8 divisors (see below), whose sum is σ = 116593632398880. Its totient is φ = 38864159178720.

The previous prime is 77728703311667. The next prime is 77728703311723. The reversal of 77728703311678 is 87611330782777.

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

It is a super-2 number, since 2×77728703311678² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95733238 + ... + 96541753.

It is an arithmetic number, because the mean of its divisors is an integer number (14574204049860).

Almost surely, 2^{77728703311678} is an apocalyptic number.

77728703311678 is a deficient number, since it is larger than the sum of its proper divisors (38864929087202).

77728703311678 is a wasteful number, since it uses less digits than its factorization.

77728703311678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192477122.

The product of its (nonzero) digits is 116169984, while the sum is 67.

The spelling of 77728703311678 in words is "seventy-seven trillion, seven hundred twenty-eight billion, seven hundred three million, three hundred eleven thousand, six hundred seventy-eight".