61231562449 has 4 divisors (see below), whose sum is σ = 61713700864. Its totient is φ = 60749424036.

The previous prime is 61231562429. The next prime is 61231562453. The reversal of 61231562449 is 94426513216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61231562449 - 2¹³ = 61231554257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61231562429) 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, 241069017 + ... + 241069270.

It is an arithmetic number, because the mean of its divisors is an integer number (15428425216).

Almost surely, 2^61231562449 is an apocalyptic number.

It is an amenable number.

61231562449 is a deficient number, since it is larger than the sum of its proper divisors (482138415).

61231562449 is a wasteful number, since it uses less digits than its factorization.

61231562449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482138414.

The product of its digits is 311040, while the sum is 43.

The spelling of 61231562449 in words is "sixty-one billion, two hundred thirty-one million, five hundred sixty-two thousand, four hundred forty-nine".