43551312121552 has 40 divisors (see below), whose sum is σ = 84684954816000. Its totient is φ = 21697179558912.

The previous prime is 43551312121507. The next prime is 43551312121579. The reversal of 43551312121552 is 25512121315534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12601824 + ... + 15681472.

It is an arithmetic number, because the mean of its divisors is an integer number (2117123870400).

Almost surely, 2^{43551312121552} is an apocalyptic number.

It is an amenable number.

43551312121552 is a deficient number, since it is larger than the sum of its proper divisors (41133642694448).

43551312121552 is a wasteful number, since it uses less digits than its factorization.

43551312121552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3082843 (or 3082837 counting only the distinct ones).

The product of its digits is 180000, while the sum is 40.

The spelling of 43551312121552 in words is "forty-three trillion, five hundred fifty-one billion, three hundred twelve million, one hundred twenty-one thousand, five hundred fifty-two".