671553534773 has 6 divisors (see below), whose sum is σ = 738153885462. Its totient is φ = 610503213320.

The previous prime is 671553534767. The next prime is 671553534797. The reversal of 671553534773 is 377435355176.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 573112589764 + 98440945009 = 757042^2 + 313753^2 .

It is not a de Polignac number, because 671553534773 - 2⁸ = 671553534517 is a prime.

It is a super-2 number, since 2×671553534773² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671553534373) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2775014486 + ... + 2775014727.

It is an arithmetic number, because the mean of its divisors is an integer number (123025647577).

Almost surely, 2^671553534773 is an apocalyptic number.

It is an amenable number.

671553534773 is a deficient number, since it is larger than the sum of its proper divisors (66600350689).

671553534773 is a wasteful number, since it uses less digits than its factorization.

671553534773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5550029235 (or 5550029224 counting only the distinct ones).

The product of its digits is 27783000, while the sum is 56.

The spelling of 671553534773 in words is "six hundred seventy-one billion, five hundred fifty-three million, five hundred thirty-four thousand, seven hundred seventy-three".