61427523221555 has 16 divisors (see below), whose sum is σ = 78053547875040. Its totient is φ = 46248668908032.

The previous prime is 61427523221483. The next prime is 61427523221587. The reversal of 61427523221555 is 55512232572416.

It is a cyclic number.

It is not a de Polignac number, because 61427523221555 - 2²⁰ = 61427522172979 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19149029 + ... + 22125558.

It is an arithmetic number, because the mean of its divisors is an integer number (4878346742190).

Almost surely, 2^{61427523221555} is an apocalyptic number.

61427523221555 is a deficient number, since it is larger than the sum of its proper divisors (16626024653485).

61427523221555 is a wasteful number, since it uses less digits than its factorization.

61427523221555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41292118.

The product of its digits is 5040000, while the sum is 50.

The spelling of 61427523221555 in words is "sixty-one trillion, four hundred twenty-seven billion, five hundred twenty-three million, two hundred twenty-one thousand, five hundred fifty-five".