77218501075 has 12 divisors (see below), whose sum is σ = 98086331448. Its totient is φ = 60268097600.

The previous prime is 77218501051. The next prime is 77218501079. The reversal of 77218501075 is 57010581277.

It is not a de Polignac number, because 77218501075 - 2⁵ = 77218501043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77218501079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37666537 + ... + 37668586.

It is an arithmetic number, because the mean of its divisors is an integer number (8173860954).

Almost surely, 2^77218501075 is an apocalyptic number.

77218501075 is a deficient number, since it is larger than the sum of its proper divisors (20867830373).

77218501075 is a wasteful number, since it uses less digits than its factorization.

77218501075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75335174 (or 75335169 counting only the distinct ones).

The product of its (nonzero) digits is 137200, while the sum is 43.

The spelling of 77218501075 in words is "seventy-seven billion, two hundred eighteen million, five hundred one thousand, seventy-five".