29891161125 has 48 divisors (see below), whose sum is σ = 61581501696. Its totient is φ = 13664527200.

The previous prime is 29891161117. The next prime is 29891161189. The reversal of 29891161125 is 52116119892.

29891161125 is a `hidden beast` number, since 2 + 9 + 8 + 9 + 1 + 1 + 611 + 25 = 666.

It is not a de Polignac number, because 29891161125 - 2³ = 29891161117 is a prime.

It is a super-2 number, since 2×29891161125² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1889977 + ... + 1905726.

It is an arithmetic number, because the mean of its divisors is an integer number (1282947952).

Almost surely, 2^29891161125 is an apocalyptic number.

29891161125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

29891161125 is an abundant number, since it is smaller than the sum of its proper divisors (31690340571).

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

29891161125 is a wasteful number, since it uses less digits than its factorization.

29891161125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795731 (or 3795718 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The spelling of 29891161125 in words is "twenty-nine billion, eight hundred ninety-one million, one hundred sixty-one thousand, one hundred twenty-five".