671553508406 has 8 divisors (see below), whose sum is σ = 1098905741064. Its totient is φ = 305251594720.

The previous prime is 671553508403. The next prime is 671553508429. The reversal of 671553508406 is 604805355176.

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

It is a super-2 number, since 2×671553508406² (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 (671553508403) 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, 15262579715 + ... + 15262579758.

It is an arithmetic number, because the mean of its divisors is an integer number (137363217633).

Almost surely, 2^671553508406 is an apocalyptic number.

671553508406 is a deficient number, since it is larger than the sum of its proper divisors (427352232658).

671553508406 is a wasteful number, since it uses less digits than its factorization.

671553508406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30525159486.

The product of its (nonzero) digits is 3024000, while the sum is 50.

The spelling of 671553508406 in words is "six hundred seventy-one billion, five hundred fifty-three million, five hundred eight thousand, four hundred six".