61616655455 has 16 divisors (see below), whose sum is σ = 75832412544. Its totient is φ = 48034533120.

The previous prime is 61616655421. The next prime is 61616655461. The reversal of 61616655455 is 55455661616.

It is a happy number.

It is not a de Polignac number, because 61616655455 - 2¹⁰ = 61616654431 is a prime.

It is a super-2 number, since 2×61616655455² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1319 + ... + 351048.

It is an arithmetic number, because the mean of its divisors is an integer number (4739525784).

Almost surely, 2^61616655455 is an apocalyptic number.

61616655455 is a deficient number, since it is larger than the sum of its proper divisors (14215757089).

61616655455 is a wasteful number, since it uses less digits than its factorization.

61616655455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353266.

The product of its digits is 3240000, while the sum is 50.

The spelling of 61616655455 in words is "sixty-one billion, six hundred sixteen million, six hundred fifty-five thousand, four hundred fifty-five".