61621222523 has 8 divisors (see below), whose sum is σ = 70544232192. Its totient is φ = 52728207336.

The previous prime is 61621222517. The next prime is 61621222571. The reversal of 61621222523 is 32522212616.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-61621222523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61621222523.

It is not an unprimeable number, because it can be changed into a prime (61621222723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7494215 + ... + 7502432.

It is an arithmetic number, because the mean of its divisors is an integer number (8818029024).

Almost surely, 2^61621222523 is an apocalyptic number.

61621222523 is a deficient number, since it is larger than the sum of its proper divisors (8923009669).

61621222523 is a wasteful number, since it uses less digits than its factorization.

61621222523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14997241.

The product of its digits is 17280, while the sum is 32.

The spelling of 61621222523 in words is "sixty-one billion, six hundred twenty-one million, two hundred twenty-two thousand, five hundred twenty-three".