55555561061 has 64 divisors (see below), whose sum is σ = 76930560000. Its totient is φ = 38726553600.

The previous prime is 55555561051. The next prime is 55555561091. The reversal of 55555561061 is 16016555555.

It is not a de Polignac number, because 55555561061 - 2²² = 55551366757 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555561021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4186565 + ... + 4199813.

It is an arithmetic number, because the mean of its divisors is an integer number (1202040000).

Almost surely, 2^55555561061 is an apocalyptic number.

It is an amenable number.

55555561061 is a deficient number, since it is larger than the sum of its proper divisors (21374998939).

55555561061 is a wasteful number, since it uses less digits than its factorization.

55555561061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13410.

The product of its (nonzero) digits is 562500, while the sum is 44.

It can be divided in two parts, 555555 and 61061, that added together give a palindrome (616616).

The spelling of 55555561061 in words is "fifty-five billion, five hundred fifty-five million, five hundred sixty-one thousand, sixty-one".