61371447437 has 4 divisors (see below), whose sum is σ = 61372333440. Its totient is φ = 61370561436.

The previous prime is 61371447427. The next prime is 61371447463. The reversal of 61371447437 is 73474417316.

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 a cyclic number.

It is not a de Polignac number, because 61371447437 - 2⁴ = 61371447421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61371447391 and 61371447400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61371447427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329387 + ... + 480872.

It is an arithmetic number, because the mean of its divisors is an integer number (15343083360).

Almost surely, 2^61371447437 is an apocalyptic number.

It is an amenable number.

61371447437 is a deficient number, since it is larger than the sum of its proper divisors (886003).

61371447437 is an equidigital number, since it uses as much as digits as its factorization.

61371447437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886002.

The product of its digits is 1185408, while the sum is 47.

The spelling of 61371447437 in words is "sixty-one billion, three hundred seventy-one million, four hundred forty-seven thousand, four hundred thirty-seven".