29976871856 has 20 divisors (see below), whose sum is σ = 59496780504. Its totient is φ = 14622864000.

The previous prime is 29976871849. The next prime is 29976871861. The reversal of 29976871856 is 65817867992.

It is a happy number.

It is a super-2 number, since 2×29976871856² (a number of 22 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, 22847570 + ... + 22848881.

Almost surely, 2^29976871856 is an apocalyptic number.

It is an amenable number.

29976871856 is a deficient number, since it is larger than the sum of its proper divisors (29519908648).

29976871856 is a wasteful number, since it uses less digits than its factorization.

29976871856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45696500 (or 45696494 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 68.

The spelling of 29976871856 in words is "twenty-nine billion, nine hundred seventy-six million, eight hundred seventy-one thousand, eight hundred fifty-six".