29911308947772 has 48 divisors (see below), whose sum is σ = 81460586081280. Its totient is φ = 8364256604352.

The previous prime is 29911308947771. The next prime is 29911308947783. The reversal of 29911308947772 is 27774980311992.

It is a junction number, because it is equal to n+sod(n) for n = 29911308947697 and 29911308947706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29911308947771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3788155747 + ... + 3788163642.

It is an arithmetic number, because the mean of its divisors is an integer number (1697095543360).

Almost surely, 2^{29911308947772} is an apocalyptic number.

It is an amenable number.

29911308947772 is an abundant number, since it is smaller than the sum of its proper divisors (51549277133508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29911308947772 is a wasteful number, since it uses less digits than its factorization.

29911308947772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7576319450 (or 7576319448 counting only the distinct ones).

The product of its (nonzero) digits is 96018048, while the sum is 69.

The spelling of 29911308947772 in words is "twenty-nine trillion, nine hundred eleven billion, three hundred eight million, nine hundred forty-seven thousand, seven hundred seventy-two".