29409745261 has 4 divisors (see below), whose sum is σ = 31672033372. Its totient is φ = 27147457152.

The previous prime is 29409745247. The next prime is 29409745283. The reversal of 29409745261 is 16254790492.

It is a happy number.

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 11063042761 + 18346702500 = 105181^2 + 135450^2 .

It is a cyclic number.

It is not a de Polignac number, because 29409745261 - 2¹³ = 29409737069 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 (29409745241) 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, 1131144036 + ... + 1131144061.

It is an arithmetic number, because the mean of its divisors is an integer number (7918008343).

Almost surely, 2^29409745261 is an apocalyptic number.

It is an amenable number.

29409745261 is a deficient number, since it is larger than the sum of its proper divisors (2262288111).

29409745261 is a wasteful number, since it uses less digits than its factorization.

29409745261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2262288110.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 29409745261 in words is "twenty-nine billion, four hundred nine million, seven hundred forty-five thousand, two hundred sixty-one".