61011055577 has 4 divisors (see below), whose sum is σ = 62979154176. Its totient is φ = 59042956980.

The previous prime is 61011055561. The next prime is 61011055663. The reversal of 61011055577 is 77555011016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61011055577 - 2⁴ = 61011055561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61011055577.

It is not an unprimeable number, because it can be changed into a prime (61011055517) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 984049253 + ... + 984049314.

It is an arithmetic number, because the mean of its divisors is an integer number (15744788544).

Almost surely, 2^61011055577 is an apocalyptic number.

It is an amenable number.

61011055577 is a deficient number, since it is larger than the sum of its proper divisors (1968098599).

61011055577 is a wasteful number, since it uses less digits than its factorization.

61011055577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968098598.

The product of its (nonzero) digits is 36750, while the sum is 38.

The spelling of 61011055577 in words is "sixty-one billion, eleven million, fifty-five thousand, five hundred seventy-seven".