61432254461 has 4 divisors (see below), whose sum is σ = 61437338172. Its totient is φ = 61427170752.

The previous prime is 61432254451. The next prime is 61432254463. The reversal of 61432254461 is 16445223416.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22359220900 + 39073033561 = 149530^2 + 197669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61432254461 is a prime.

It is a super-2 number, since 2×61432254461² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61432254463) 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, 2523686 + ... + 2547911.

It is an arithmetic number, because the mean of its divisors is an integer number (15359334543).

Almost surely, 2^61432254461 is an apocalyptic number.

It is an amenable number.

61432254461 is a deficient number, since it is larger than the sum of its proper divisors (5083711).

61432254461 is a wasteful number, since it uses less digits than its factorization.

61432254461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083710.

The product of its digits is 138240, while the sum is 38.

Adding to 61432254461 its reverse (16445223416), we get a palindrome (77877477877).

The spelling of 61432254461 in words is "sixty-one billion, four hundred thirty-two million, two hundred fifty-four thousand, four hundred sixty-one".