77531245029 has 12 divisors (see below), whose sum is σ = 127988087136. Its totient is φ = 44303568552.

The previous prime is 77531245021. The next prime is 77531245079. The reversal of 77531245029 is 92054213577.

It is a happy number.

77531245029 is a `hidden beast` number, since 77 + 53 + 1 + 24 + 502 + 9 = 666.

It is not a de Polignac number, because 77531245029 - 2³ = 77531245021 is a prime.

It is a super-2 number, since 2×77531245029² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77531245021) 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, 615327279 + ... + 615327404.

It is an arithmetic number, because the mean of its divisors is an integer number (10665673928).

Almost surely, 2^77531245029 is an apocalyptic number.

It is an amenable number.

77531245029 is a deficient number, since it is larger than the sum of its proper divisors (50456842107).

77531245029 is a wasteful number, since it uses less digits than its factorization.

77531245029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230654696 (or 1230654693 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The spelling of 77531245029 in words is "seventy-seven billion, five hundred thirty-one million, two hundred forty-five thousand, twenty-nine".