61288544937 has 4 divisors (see below), whose sum is σ = 81718059920. Its totient is φ = 40859029956.

The previous prime is 61288544921. The next prime is 61288544971. The reversal of 61288544937 is 73944588216.

It is a happy number.

61288544937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 61288544937 - 2⁴ = 61288544921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61288544137) 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, 10214757487 + ... + 10214757492.

It is an arithmetic number, because the mean of its divisors is an integer number (20429514980).

Almost surely, 2^61288544937 is an apocalyptic number.

It is an amenable number.

61288544937 is a deficient number, since it is larger than the sum of its proper divisors (20429514983).

61288544937 is a wasteful number, since it uses less digits than its factorization.

61288544937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20429514982.

The product of its digits is 11612160, while the sum is 57.

The spelling of 61288544937 in words is "sixty-one billion, two hundred eighty-eight million, five hundred forty-four thousand, nine hundred thirty-seven".