447431352121555 has 8 divisors (see below), whose sum is σ = 537028762633344. Its totient is φ = 357870988305600.

The previous prime is 447431352121543. The next prime is 447431352121597. The reversal of 447431352121555 is 555121253134744.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 447431352121555 - 2⁷ = 447431352121427 is a prime.

It is a super-2 number, since 2×447431352121555² (a number of 30 digits) contains 22 as substring.

It is a Duffinian 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, 9261647386 + ... + 9261695695.

It is an arithmetic number, because the mean of its divisors is an integer number (67128595329168).

Almost surely, 2^{447431352121555} is an apocalyptic number.

447431352121555 is a deficient number, since it is larger than the sum of its proper divisors (89597410511789).

447431352121555 is a wasteful number, since it uses less digits than its factorization.

447431352121555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18523347917.

The product of its digits is 10080000, while the sum is 52.

The spelling of 447431352121555 in words is "four hundred forty-seven trillion, four hundred thirty-one billion, three hundred fifty-two million, one hundred twenty-one thousand, five hundred fifty-five".