61445051518 has 4 divisors (see below), whose sum is σ = 92167577280. Its totient is φ = 30722525758.

The previous prime is 61445051489. The next prime is 61445051537. The reversal of 61445051518 is 81515054416.

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, 15361262878 + ... + 15361262881.

It is an arithmetic number, because the mean of its divisors is an integer number (23041894320).

Almost surely, 2^61445051518 is an apocalyptic number.

61445051518 is a deficient number, since it is larger than the sum of its proper divisors (30722525762).

61445051518 is a wasteful number, since it uses less digits than its factorization.

61445051518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30722525761.

The product of its (nonzero) digits is 96000, while the sum is 40.

The spelling of 61445051518 in words is "sixty-one billion, four hundred forty-five million, fifty-one thousand, five hundred eighteen".