671085064157 has 4 divisors (see below), whose sum is σ = 686691693600. Its totient is φ = 655478434716.

The previous prime is 671085064151. The next prime is 671085064159. The reversal of 671085064157 is 751460580176.

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 a de Polignac number, because none of the positive numbers 2^k-671085064157 is a prime.

It is a super-4 number, since 4×671085064157⁴ (a number of 48 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671085064151) 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, 7803314657 + ... + 7803314742.

It is an arithmetic number, because the mean of its divisors is an integer number (171672923400).

Almost surely, 2^671085064157 is an apocalyptic number.

It is an amenable number.

671085064157 is a deficient number, since it is larger than the sum of its proper divisors (15606629443).

671085064157 is a wasteful number, since it uses less digits than its factorization.

671085064157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15606629442.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 671085064157 in words is "six hundred seventy-one billion, eighty-five million, sixty-four thousand, one hundred fifty-seven".