61551626043 has 4 divisors (see below), whose sum is σ = 82068834728. Its totient is φ = 41034417360.

The previous prime is 61551626039. The next prime is 61551626083. The reversal of 61551626043 is 34062615516.

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

It is not a de Polignac number, because 61551626043 - 2² = 61551626039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61551625992 and 61551626010.

It is not an unprimeable number, because it can be changed into a prime (61551626033) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10258604338 + ... + 10258604343.

It is an arithmetic number, because the mean of its divisors is an integer number (20517208682).

Almost surely, 2^61551626043 is an apocalyptic number.

61551626043 is a deficient number, since it is larger than the sum of its proper divisors (20517208685).

61551626043 is a wasteful number, since it uses less digits than its factorization.

61551626043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20517208684.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 61551626043 in words is "sixty-one billion, five hundred fifty-one million, six hundred twenty-six thousand, forty-three".