61430111755 has 4 divisors (see below), whose sum is σ = 73716134112. Its totient is φ = 49144089400.

The previous prime is 61430111747. The next prime is 61430111773. The reversal of 61430111755 is 55711103416.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61430111755 - 2³ = 61430111747 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61430111755.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6143011171 + ... + 6143011180.

It is an arithmetic number, because the mean of its divisors is an integer number (18429033528).

Almost surely, 2^61430111755 is an apocalyptic number.

61430111755 is a deficient number, since it is larger than the sum of its proper divisors (12286022357).

61430111755 is a wasteful number, since it uses less digits than its factorization.

61430111755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12286022356.

The product of its (nonzero) digits is 12600, while the sum is 34.

The spelling of 61430111755 in words is "sixty-one billion, four hundred thirty million, one hundred eleven thousand, seven hundred fifty-five".