43061686551 has 36 divisors (see below), whose sum is σ = 67420555488. Its totient is φ = 26472880512.

The previous prime is 43061686531. The next prime is 43061686597. The reversal of 43061686551 is 15568616034.

43061686551 is a `hidden beast` number, since 4 + 3 + 0 + 6 + 16 + 86 + 551 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-43061686551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43061686497 and 43061686506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43061686531) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1557490 + ... + 1584896.

It is an arithmetic number, because the mean of its divisors is an integer number (1872793208).

Almost surely, 2^43061686551 is an apocalyptic number.

43061686551 is a deficient number, since it is larger than the sum of its proper divisors (24358868937).

43061686551 is a wasteful number, since it uses less digits than its factorization.

43061686551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28472 (or 28456 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 43061686551 in words is "forty-three billion, sixty-one million, six hundred eighty-six thousand, five hundred fifty-one".