29997465397261 has 4 divisors (see below), whose sum is σ = 30099845825532. Its totient is φ = 29895084968992.

The previous prime is 29997465397223. The next prime is 29997465397279. The reversal of 29997465397261 is 16279356479992.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29059484769225 + 937980628036 = 5390685^2 + 968494^2 .

It is a cyclic number.

It is not a de Polignac number, because 29997465397261 - 2²⁷ = 29997331179533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29997465397561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51190213696 + ... + 51190214281.

It is an arithmetic number, because the mean of its divisors is an integer number (7524961456383).

Almost surely, 2^{29997465397261} is an apocalyptic number.

It is an amenable number.

29997465397261 is a deficient number, since it is larger than the sum of its proper divisors (102380428271).

29997465397261 is a wasteful number, since it uses less digits than its factorization.

29997465397261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102380428270.

The product of its digits is 2777664960, while the sum is 79.

The spelling of 29997465397261 in words is "twenty-nine trillion, nine hundred ninety-seven billion, four hundred sixty-five million, three hundred ninety-seven thousand, two hundred sixty-one".