61536461 has 4 divisors (see below), whose sum is σ = 70327392. Its totient is φ = 52745532.

The previous prime is 61536451. The next prime is 61536479. The reversal of 61536461 is 16463516.

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 not a de Polignac number, because 61536461 - 2¹⁴ = 61520077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61536401) 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, 4395455 + ... + 4395468.

It is an arithmetic number, because the mean of its divisors is an integer number (17581848).

Almost surely, 2^61536461 is an apocalyptic number.

It is an amenable number.

61536461 is a deficient number, since it is larger than the sum of its proper divisors (8790931).

61536461 is an equidigital number, since it uses as much as digits as its factorization.

61536461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8790930.

The product of its digits is 12960, while the sum is 32.

The square root of 61536461 is about 7844.5178946829. The cubic root of 61536461 is about 394.8003285019.

Adding to 61536461 its reverse (16463516), we get a palindrome (77999977).

The spelling of 61536461 in words is "sixty-one million, five hundred thirty-six thousand, four hundred sixty-one".