61011055009 has 8 divisors (see below), whose sum is σ = 61299584360. Its totient is φ = 60722718336.

The previous prime is 61011054989. The next prime is 61011055043. The reversal of 61011055009 is 90055011016.

It can be written as a sum of positive squares in 4 ways, for example, as 43724064609 + 17286990400 = 209103^2 + 131480^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61011055009 - 2¹⁷ = 61010923937 is a prime.

It is a super-2 number, since 2×61011055009² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61011053009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 607627 + ... + 700879.

It is an arithmetic number, because the mean of its divisors is an integer number (7662448045).

Almost surely, 2^61011055009 is an apocalyptic number.

It is an amenable number.

61011055009 is a deficient number, since it is larger than the sum of its proper divisors (288529351).

61011055009 is a wasteful number, since it uses less digits than its factorization.

61011055009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96339.

The product of its (nonzero) digits is 1350, while the sum is 28.

The spelling of 61011055009 in words is "sixty-one billion, eleven million, fifty-five thousand, nine".