29149553781 has 16 divisors (see below), whose sum is σ = 43195472320. Its totient is φ = 19428109200.

The previous prime is 29149553777. The next prime is 29149553809. The reversal of 29149553781 is 18735594192.

It is a happy number.

29149553781 is a `hidden beast` number, since 2 + 9 + 1 + 4 + 9 + 553 + 7 + 81 = 666.

It is not a de Polignac number, because 29149553781 - 2² = 29149553777 is a prime.

It is a super-2 number, since 2×29149553781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29149553731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26770 + ... + 242931.

It is an arithmetic number, because the mean of its divisors is an integer number (2699717020).

Almost surely, 2^29149553781 is an apocalyptic number.

It is an amenable number.

29149553781 is a deficient number, since it is larger than the sum of its proper divisors (14045918539).

29149553781 is a wasteful number, since it uses less digits than its factorization.

29149553781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273713 (or 273707 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 54.

The spelling of 29149553781 in words is "twenty-nine billion, one hundred forty-nine million, five hundred fifty-three thousand, seven hundred eighty-one".