43486865557 has 4 divisors (see below), whose sum is σ = 43729809120. Its totient is φ = 43243921996.

The previous prime is 43486865501. The next prime is 43486865599. The reversal of 43486865557 is 75556868434.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43486865557 is a prime.

It is a super-2 number, since 2×43486865557² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43486865495 and 43486865504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43486815557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121471513 + ... + 121471870.

It is an arithmetic number, because the mean of its divisors is an integer number (10932452280).

Almost surely, 2^43486865557 is an apocalyptic number.

It is an amenable number.

43486865557 is a deficient number, since it is larger than the sum of its proper divisors (242943563).

43486865557 is a wasteful number, since it uses less digits than its factorization.

43486865557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242943562.

The product of its digits is 96768000, while the sum is 61.

The spelling of 43486865557 in words is "forty-three billion, four hundred eighty-six million, eight hundred sixty-five thousand, five hundred fifty-seven".