87578393643 has 60 divisors (see below), whose sum is σ = 140975859480. Its totient is φ = 53734472064.

The previous prime is 87578393593. The next prime is 87578393657. The reversal of 87578393643 is 34639387578.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 87578393643 - 2²⁰ = 87577345067 is a prime.

It is a super-2 number, since 2×87578393643² (a number of 23 digits) contains 22 as substring.

Its product of digits (91445760) is a multiple of the sum of its prime factors (735).

It is not an unprimeable number, because it can be changed into a prime (87578393443) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 259876371 + ... + 259876707.

It is an arithmetic number, because the mean of its divisors is an integer number (2349597658).

Almost surely, 2^87578393643 is an apocalyptic number.

87578393643 is a deficient number, since it is larger than the sum of its proper divisors (53397465837).

87578393643 is an frugal number, since it uses more digits than its factorization.

87578393643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 353 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 63.

The spelling of 87578393643 in words is "eighty-seven billion, five hundred seventy-eight million, three hundred ninety-three thousand, six hundred forty-three".