671436925056 has 96 divisors (see below), whose sum is σ = 1934335716300. Its totient is φ = 223556769792.

The previous prime is 671436925037. The next prime is 671436925063. The reversal of 671436925056 is 650529634176.

671436925056 is a `hidden beast` number, since 6 + 7 + 1 + 43 + 6 + 92 + 505 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 671390139456 + 46785600 = 819384^2 + 6840^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 671436924993 and 671436925011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 678010 + ... + 1342598.

Almost surely, 2^671436925056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 671436925056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (967167858150).

671436925056 is an abundant number, since it is smaller than the sum of its proper divisors (1262898791244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671436925056 is a wasteful number, since it uses less digits than its factorization.

671436925056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665486 (or 665471 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 671436925056 in words is "six hundred seventy-one billion, four hundred thirty-six million, nine hundred twenty-five thousand, fifty-six".