77532999728 has 10 divisors (see below), whose sum is σ = 150220187004. Its totient is φ = 38766499856.

The previous prime is 77532999727. The next prime is 77532999737. The reversal of 77532999728 is 82799923577.

It is a happy number.

It is a super-2 number, since 2×77532999728² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77532999721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2422906226 + ... + 2422906257.

Almost surely, 2^77532999728 is an apocalyptic number.

It is an amenable number.

77532999728 is a deficient number, since it is larger than the sum of its proper divisors (72687187276).

77532999728 is a wasteful number, since it uses less digits than its factorization.

77532999728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4845812491 (or 4845812485 counting only the distinct ones).

The product of its digits is 120022560, while the sum is 68.

The spelling of 77532999728 in words is "seventy-seven billion, five hundred thirty-two million, nine hundred ninety-nine thousand, seven hundred twenty-eight".