87145624399 has 4 divisors (see below), whose sum is σ = 90150645960. Its totient is φ = 84140602840.

The previous prime is 87145624381. The next prime is 87145624427. The reversal of 87145624399 is 99342654178.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87145624399 - 2⁵ = 87145624367 is a prime.

It is a super-2 number, since 2×87145624399² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87145621399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1502510737 + ... + 1502510794.

It is an arithmetic number, because the mean of its divisors is an integer number (22537661490).

Almost surely, 2^87145624399 is an apocalyptic number.

87145624399 is a deficient number, since it is larger than the sum of its proper divisors (3005021561).

87145624399 is a wasteful number, since it uses less digits than its factorization.

87145624399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3005021560.

The product of its digits is 13063680, while the sum is 58.

The spelling of 87145624399 in words is "eighty-seven billion, one hundred forty-five million, six hundred twenty-four thousand, three hundred ninety-nine".