55505100061 has 2 divisors, whose sum is σ = 55505100062. Its totient is φ = 55505100060.

The previous prime is 55505100047. The next prime is 55505100073. The reversal of 55505100061 is 16000150555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50892652836 + 4612447225 = 225594^2 + 67915^2 .

It is a cyclic number.

It is not a de Polignac number, because 55505100061 - 2⁵ = 55505100029 is a prime.

It is a super-2 number, since 2×55505100061² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55505100361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27752550030 + 27752550031.

It is an arithmetic number, because the mean of its divisors is an integer number (27752550031).

Almost surely, 2^55505100061 is an apocalyptic number.

It is an amenable number.

55505100061 is a deficient number, since it is larger than the sum of its proper divisors (1).

55505100061 is an equidigital number, since it uses as much as digits as its factorization.

55505100061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 55505100061 in words is "fifty-five billion, five hundred five million, one hundred thousand, sixty-one".