671379131537 has 4 divisors (see below), whose sum is σ = 671381009520. Its totient is φ = 671377253556.

The previous prime is 671379131519. The next prime is 671379131543. The reversal of 671379131537 is 735131973176.

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 not a de Polignac number, because 671379131537 - 2⁸ = 671379131281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671379131567) 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, 218423 + ... + 1179180.

It is an arithmetic number, because the mean of its divisors is an integer number (167845252380).

Almost surely, 2^671379131537 is an apocalyptic number.

It is an amenable number.

671379131537 is a deficient number, since it is larger than the sum of its proper divisors (1877983).

671379131537 is a wasteful number, since it uses less digits than its factorization.

671379131537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877982.

The product of its digits is 2500470, while the sum is 53.

The spelling of 671379131537 in words is "six hundred seventy-one billion, three hundred seventy-nine million, one hundred thirty-one thousand, five hundred thirty-seven".