29811073945 has 12 divisors (see below), whose sum is σ = 38001384684. Its totient is φ = 22445984000.

The previous prime is 29811073931. The next prime is 29811073949. The reversal of 29811073945 is 54937011892.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 456762384 + 29354311561 = 21372^2 + 171331^2 .

It is not a de Polignac number, because 29811073945 - 2⁵ = 29811073913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29811073949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10313806 + ... + 10316695.

It is an arithmetic number, because the mean of its divisors is an integer number (3166782057).

Almost surely, 2^29811073945 is an apocalyptic number.

It is an amenable number.

29811073945 is a deficient number, since it is larger than the sum of its proper divisors (8190310739).

29811073945 is a wasteful number, since it uses less digits than its factorization.

29811073945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20630540 (or 20630523 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 29811073945 in words is "twenty-nine billion, eight hundred eleven million, seventy-three thousand, nine hundred forty-five".