61514443538 has 4 divisors (see below), whose sum is σ = 92271665310. Its totient is φ = 30757221768.

The previous prime is 61514443531. The next prime is 61514443579. The reversal of 61514443538 is 83534441516.

61514443538 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.

It can be written as a sum of positive squares in only one way, i.e., 38057376889 + 23457066649 = 195083^2 + 153157^2 .

It is not an unprimeable number, because it can be changed into a prime (61514443531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15378610883 + ... + 15378610886.

Almost surely, 2^61514443538 is an apocalyptic number.

61514443538 is a deficient number, since it is larger than the sum of its proper divisors (30757221772).

61514443538 is a wasteful number, since it uses less digits than its factorization.

61514443538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30757221771.

The product of its digits is 691200, while the sum is 44.

The spelling of 61514443538 in words is "sixty-one billion, five hundred fourteen million, four hundred forty-three thousand, five hundred thirty-eight".