61539124463 has 4 divisors (see below), whose sum is σ = 61689587280. Its totient is φ = 61388661648.

The previous prime is 61539124459. The next prime is 61539124469. The reversal of 61539124463 is 36442193516.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61539124463 - 2² = 61539124459 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 (61539124469) 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, 75230795 + ... + 75231612.

It is an arithmetic number, because the mean of its divisors is an integer number (15422396820).

Almost surely, 2^61539124463 is an apocalyptic number.

61539124463 is a deficient number, since it is larger than the sum of its proper divisors (150462817).

61539124463 is a wasteful number, since it uses less digits than its factorization.

61539124463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150462816.

The product of its digits is 466560, while the sum is 44.

The spelling of 61539124463 in words is "sixty-one billion, five hundred thirty-nine million, one hundred twenty-four thousand, four hundred sixty-three".