61201042431 has 24 divisors (see below), whose sum is σ = 82869028656. Its totient is φ = 40176090240.

The previous prime is 61201042421. The next prime is 61201042439. The reversal of 61201042431 is 13424010216.

It is not a de Polignac number, because 61201042431 - 2⁷ = 61201042303 is a prime.

It is a super-2 number, since 2×61201042431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61201042439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6464041 + ... + 6473501.

It is an arithmetic number, because the mean of its divisors is an integer number (3452876194).

Almost surely, 2^61201042431 is an apocalyptic number.

61201042431 is a deficient number, since it is larger than the sum of its proper divisors (21667986225).

61201042431 is an equidigital number, since it uses as much as digits as its factorization.

61201042431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9943 (or 9860 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 61201042431 its reverse (13424010216), we get a palindrome (74625052647).

The spelling of 61201042431 in words is "sixty-one billion, two hundred one million, forty-two thousand, four hundred thirty-one".