1027561623127 has 4 divisors (see below), whose sum is σ = 1106604824920. Its totient is φ = 948518421336.

The previous prime is 1027561623071. The next prime is 1027561623131. The reversal of 1027561623127 is 7213261657201.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1027561623127 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 (1027561623227) 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, 39521600877 + ... + 39521600902.

It is an arithmetic number, because the mean of its divisors is an integer number (276651206230).

Almost surely, 2^{1027561623127} is an apocalyptic number.

1027561623127 is a deficient number, since it is larger than the sum of its proper divisors (79043201793).

1027561623127 is an equidigital number, since it uses as much as digits as its factorization.

1027561623127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79043201792.

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 1027561623127 in words is "one trillion, twenty-seven billion, five hundred sixty-one million, six hundred twenty-three thousand, one hundred twenty-seven".