77730051585242 has 16 divisors (see below), whose sum is σ = 133485702459840. Its totient is φ = 33254332886688.

The previous prime is 77730051585211. The next prime is 77730051585247. The reversal of 77730051585242 is 24258515003777.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77730051585247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4878855428 + ... + 4878871359.

It is an arithmetic number, because the mean of its divisors is an integer number (8342856403740).

Almost surely, 2^{77730051585242} is an apocalyptic number.

77730051585242 is a deficient number, since it is larger than the sum of its proper divisors (55755650874598).

77730051585242 is a wasteful number, since it uses less digits than its factorization.

77730051585242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9757727365.

The product of its (nonzero) digits is 16464000, while the sum is 56.

The spelling of 77730051585242 in words is "seventy-seven trillion, seven hundred thirty billion, fifty-one million, five hundred eighty-five thousand, two hundred forty-two".