77145307810 has 32 divisors (see below), whose sum is σ = 141260993280. Its totient is φ = 30325254528.

The previous prime is 77145307781. The next prime is 77145307823. The reversal of 77145307810 is 1870354177.

It is a happy number.

It is a super-2 number, since 2×77145307810² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1952814 + ... + 1991926.

It is an arithmetic number, because the mean of its divisors is an integer number (4414406040).

Almost surely, 2^77145307810 is an apocalyptic number.

77145307810 is a deficient number, since it is larger than the sum of its proper divisors (64115685470).

77145307810 is a wasteful number, since it uses less digits than its factorization.

77145307810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42522.

The product of its (nonzero) digits is 164640, while the sum is 43.

The spelling of 77145307810 in words is "seventy-seven billion, one hundred forty-five million, three hundred seven thousand, eight hundred ten".