611055555501 has 4 divisors (see below), whose sum is σ = 814740740672. Its totient is φ = 407370370332.

The previous prime is 611055555491. The next prime is 611055555559. The reversal of 611055555501 is 105555550116.

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 not a de Polignac number, because 611055555501 - 2⁵ = 611055555469 is a prime.

It is a super-2 number, since 2×611055555501² (a number of 24 digits) contains 22 as substring.

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 611055555501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611055551501) 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, 101842592581 + ... + 101842592586.

It is an arithmetic number, because the mean of its divisors is an integer number (203685185168).

Almost surely, 2^611055555501 is an apocalyptic number.

It is an amenable number.

611055555501 is a deficient number, since it is larger than the sum of its proper divisors (203685185171).

611055555501 is a wasteful number, since it uses less digits than its factorization.

611055555501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203685185170.

The product of its (nonzero) digits is 93750, while the sum is 39.

It can be divided in two parts, 6110 and 55555501, that added together give a triangular number (55561611 = T₁₀₅₄₁).

The spelling of 611055555501 in words is "six hundred eleven billion, fifty-five million, five hundred fifty-five thousand, five hundred one".