671242036520 has 64 divisors (see below), whose sum is σ = 1700742320640. Its totient is φ = 236214201600.

The previous prime is 671242036513. The next prime is 671242036529. The reversal of 671242036520 is 25630242176.

It is not an unprimeable number, because it can be changed into a prime (671242036529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24592007 + ... + 24619286.

It is an arithmetic number, because the mean of its divisors is an integer number (26574098760).

Almost surely, 2^671242036520 is an apocalyptic number.

It is an amenable number.

671242036520 is an abundant number, since it is smaller than the sum of its proper divisors (1029500284120).

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

671242036520 is a wasteful number, since it uses less digits than its factorization.

671242036520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49211346 (or 49211342 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

Adding to 671242036520 its reverse (25630242176), we get a palindrome (696872278696).

The spelling of 671242036520 in words is "six hundred seventy-one billion, two hundred forty-two million, thirty-six thousand, five hundred twenty".