671424531525 has 72 divisors (see below), whose sum is σ = 1312210995264. Its totient is φ = 325467667200.

The previous prime is 671424531523. The next prime is 671424531563. The reversal of 671424531525 is 525135424176.

671424531525 is a `hidden beast` number, since 6 + 7 + 1 + 42 + 453 + 152 + 5 = 666.

It is not a de Polignac number, because 671424531525 - 2¹ = 671424531523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671424531523) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 12266017 + ... + 12320633.

It is an arithmetic number, because the mean of its divisors is an integer number (18225152712).

Almost surely, 2^671424531525 is an apocalyptic number.

It is an amenable number.

671424531525 is a deficient number, since it is larger than the sum of its proper divisors (640786463739).

671424531525 is a wasteful number, since it uses less digits than its factorization.

671424531525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59611 (or 59603 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The spelling of 671424531525 in words is "six hundred seventy-one billion, four hundred twenty-four million, five hundred thirty-one thousand, five hundred twenty-five".