61427523221461 has 4 divisors (see below), whose sum is σ = 62434531798924. Its totient is φ = 60420514644000.

The previous prime is 61427523221437. The next prime is 61427523221483. The reversal of 61427523221461 is 16412232572416.

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 4266211761361 + 57161311460100 = 2065481^2 + 7560510^2 .

It is a cyclic number.

It is not a de Polignac number, because 61427523221461 - 2⁵ = 61427523221429 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 (61427563221461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503504288640 + ... + 503504288761.

It is an arithmetic number, because the mean of its divisors is an integer number (15608632949731).

Almost surely, 2^{61427523221461} is an apocalyptic number.

61427523221461 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

61427523221461 is a deficient number, since it is larger than the sum of its proper divisors (1007008577463).

61427523221461 is a wasteful number, since it uses less digits than its factorization.

61427523221461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007008577462.

The product of its digits is 967680, while the sum is 46.

Adding to 61427523221461 its reverse (16412232572416), we get a palindrome (77839755793877).

The spelling of 61427523221461 in words is "sixty-one trillion, four hundred twenty-seven billion, five hundred twenty-three million, two hundred twenty-one thousand, four hundred sixty-one".