61028127577 has 4 divisors (see below), whose sum is σ = 61028807476. Its totient is φ = 61027447680.

The previous prime is 61028127571. The next prime is 61028127581. The reversal of 61028127577 is 77572182016.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 36031252761 + 24996874816 = 189819^2 + 158104^2 .

It is a cyclic number.

It is not a de Polignac number, because 61028127577 - 2⁷ = 61028127449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61028127571) 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, 180324 + ... + 393157.

It is an arithmetic number, because the mean of its divisors is an integer number (15257201869).

Almost surely, 2^61028127577 is an apocalyptic number.

It is an amenable number.

61028127577 is a deficient number, since it is larger than the sum of its proper divisors (679899).

61028127577 is a wasteful number, since it uses less digits than its factorization.

61028127577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679898.

The product of its (nonzero) digits is 329280, while the sum is 46.

The spelling of 61028127577 in words is "sixty-one billion, twenty-eight million, one hundred twenty-seven thousand, five hundred seventy-seven".