87958724578 has 8 divisors (see below), whose sum is σ = 131972628060. Its totient is φ = 43967848560.

The previous prime is 87958724569. The next prime is 87958724587. The reversal of 87958724578 is 87542785978.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87958724569) and next prime (87958724587).

It can be written as a sum of positive squares in 2 ways, for example, as 87934192369 + 24532209 = 296537^2 + 4953^2 .

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

It is a super-2 number, since 2×87958724578² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5747313 + ... + 5762596.

Almost surely, 2^87958724578 is an apocalyptic number.

87958724578 is a deficient number, since it is larger than the sum of its proper divisors (44013903482).

87958724578 is a wasteful number, since it uses less digits than its factorization.

87958724578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11513732.

The product of its digits is 316108800, while the sum is 70.

The spelling of 87958724578 in words is "eighty-seven billion, nine hundred fifty-eight million, seven hundred twenty-four thousand, five hundred seventy-eight".