87525785409 has 8 divisors (see below), whose sum is σ = 116707168320. Its totient is φ = 58347463056.

The previous prime is 87525785323. The next prime is 87525785437. The reversal of 87525785409 is 90458752578.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87525785409 - 2⁸ = 87525785153 is a prime.

It is a super-2 number, since 2×87525785409² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87525785509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697557 + ... + 813410.

It is an arithmetic number, because the mean of its divisors is an integer number (14588396040).

Almost surely, 2^87525785409 is an apocalyptic number.

It is an amenable number.

87525785409 is a deficient number, since it is larger than the sum of its proper divisors (29181382911).

87525785409 is a wasteful number, since it uses less digits than its factorization.

87525785409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530279.

The product of its (nonzero) digits is 28224000, while the sum is 60.

The spelling of 87525785409 in words is "eighty-seven billion, five hundred twenty-five million, seven hundred eighty-five thousand, four hundred nine".