61731477573 has 16 divisors (see below), whose sum is σ = 82455300672. Its totient is φ = 41081040000.

The previous prime is 61731477569. The next prime is 61731477583. The reversal of 61731477573 is 37577413716.

It is a happy number.

It is not a de Polignac number, because 61731477573 - 2² = 61731477569 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61731477583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6229923 + ... + 6239823.

It is an arithmetic number, because the mean of its divisors is an integer number (5153456292).

Almost surely, 2^61731477573 is an apocalyptic number.

It is an amenable number.

61731477573 is a deficient number, since it is larger than the sum of its proper divisors (20723823099).

61731477573 is a wasteful number, since it uses less digits than its factorization.

61731477573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13396.

The product of its digits is 2593080, while the sum is 51.

The spelling of 61731477573 in words is "sixty-one billion, seven hundred thirty-one million, four hundred seventy-seven thousand, five hundred seventy-three".