77702648731222 has 16 divisors (see below), whose sum is σ = 116945432920800. Its totient is φ = 38721056513152.

The previous prime is 77702648731219. The next prime is 77702648731243. The reversal of 77702648731222 is 22213784620777.

It is a happy number.

It is a super-2 number, since 2×77702648731222² (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 7 ways as a sum of consecutive naturals, for example, 53977873 + ... + 55398700.

It is an arithmetic number, because the mean of its divisors is an integer number (7309089557550).

Almost surely, 2^{77702648731222} is an apocalyptic number.

77702648731222 is a deficient number, since it is larger than the sum of its proper divisors (39242784189578).

77702648731222 is a wasteful number, since it uses less digits than its factorization.

77702648731222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109377767.

The product of its (nonzero) digits is 22127616, while the sum is 58.

The spelling of 77702648731222 in words is "seventy-seven trillion, seven hundred two billion, six hundred forty-eight million, seven hundred thirty-one thousand, two hundred twenty-two".