61550412542 has 4 divisors (see below), whose sum is σ = 92325618816. Its totient is φ = 30775206270.

The previous prime is 61550412527. The next prime is 61550412569. The reversal of 61550412542 is 24521405516.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15387603134 + ... + 15387603137.

It is an arithmetic number, because the mean of its divisors is an integer number (23081404704).

Almost surely, 2^61550412542 is an apocalyptic number.

61550412542 is a deficient number, since it is larger than the sum of its proper divisors (30775206274).

61550412542 is a wasteful number, since it uses less digits than its factorization.

61550412542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30775206273.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 61550412542 in words is "sixty-one billion, five hundred fifty million, four hundred twelve thousand, five hundred forty-two".