61226645131 has 4 divisors (see below), whose sum is σ = 61237621264. Its totient is φ = 61215669000.

The previous prime is 61226645101. The next prime is 61226645149. The reversal of 61226645131 is 13154662216.

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

It is a cyclic number.

It is not a de Polignac number, because 61226645131 - 2⁵ = 61226645099 is a prime.

It is a super-2 number, since 2×61226645131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61226645101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5479695 + ... + 5490856.

It is an arithmetic number, because the mean of its divisors is an integer number (15309405316).

Almost surely, 2^61226645131 is an apocalyptic number.

61226645131 is a deficient number, since it is larger than the sum of its proper divisors (10976133).

61226645131 is a wasteful number, since it uses less digits than its factorization.

61226645131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10976132.

The product of its digits is 51840, while the sum is 37.

The spelling of 61226645131 in words is "sixty-one billion, two hundred twenty-six million, six hundred forty-five thousand, one hundred thirty-one".