61055555501 has 2 divisors, whose sum is σ = 61055555502. Its totient is φ = 61055555500.

The previous prime is 61055555479. The next prime is 61055555537. The reversal of 61055555501 is 10555555016.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61013940100 + 41615401 = 247010^2 + 6451^2 .

It is a cyclic number.

It is not a de Polignac number, because 61055555501 - 2³⁴ = 43875686317 is a prime.

It is a super-3 number, since 3×61055555501³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61055555801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30527777750 + 30527777751.

It is an arithmetic number, because the mean of its divisors is an integer number (30527777751).

Almost surely, 2^61055555501 is an apocalyptic number.

It is an amenable number.

61055555501 is a deficient number, since it is larger than the sum of its proper divisors (1).

61055555501 is an equidigital number, since it uses as much as digits as its factorization.

61055555501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 61055555501 in words is "sixty-one billion, fifty-five million, five hundred fifty-five thousand, five hundred one".