61430642655 has 32 divisors (see below), whose sum is σ = 104084720064. Its totient is φ = 30831630336.

The previous prime is 61430642653. The next prime is 61430642659. The reversal of 61430642655 is 55624603416.

It is not a de Polignac number, because 61430642655 - 2¹ = 61430642653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61430642653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2946849 + ... + 2967621.

It is an arithmetic number, because the mean of its divisors is an integer number (3252647502).

Almost surely, 2^61430642655 is an apocalyptic number.

61430642655 is a deficient number, since it is larger than the sum of its proper divisors (42654077409).

61430642655 is a wasteful number, since it uses less digits than its factorization.

61430642655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32395.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 61430642655 in words is "sixty-one billion, four hundred thirty million, six hundred forty-two thousand, six hundred fifty-five".