77259145892 has 12 divisors (see below), whose sum is σ = 138501152076. Its totient is φ = 37687388160.

The previous prime is 77259145883. The next prime is 77259145913. The reversal of 77259145892 is 29854195277.

It can be written as a sum of positive squares in 2 ways, for example, as 964972096 + 76294173796 = 31064^2 + 276214^2 .

It is a super-2 number, since 2×77259145892² (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 3 ways as a sum of consecutive naturals, for example, 235546013 + ... + 235546340.

It is an arithmetic number, because the mean of its divisors is an integer number (11541762673).

Almost surely, 2^77259145892 is an apocalyptic number.

It is an amenable number.

77259145892 is a deficient number, since it is larger than the sum of its proper divisors (61242006184).

77259145892 is a wasteful number, since it uses less digits than its factorization.

77259145892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471092398 (or 471092396 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 59.

The spelling of 77259145892 in words is "seventy-seven billion, two hundred fifty-nine million, one hundred forty-five thousand, eight hundred ninety-two".