671321573511 has 8 divisors (see below), whose sum is σ = 895102022640. Its totient is φ = 447544420032.

The previous prime is 671321573449. The next prime is 671321573521. The reversal of 671321573511 is 115375123176.

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

It is not a de Polignac number, because 671321573511 - 2⁷ = 671321573383 is a prime.

It is a super-2 number, since 2×671321573511² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671321573521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301246 + ... + 1197243.

It is an arithmetic number, because the mean of its divisors is an integer number (111887752830).

Almost surely, 2^671321573511 is an apocalyptic number.

671321573511 is a deficient number, since it is larger than the sum of its proper divisors (223780449129).

671321573511 is a wasteful number, since it uses less digits than its factorization.

671321573511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647825.

The product of its digits is 132300, while the sum is 42.

Adding to 671321573511 its reverse (115375123176), we get a palindrome (786696696687).

The spelling of 671321573511 in words is "six hundred seventy-one billion, three hundred twenty-one million, five hundred seventy-three thousand, five hundred eleven".