23687242721578 has 16 divisors (see below), whose sum is σ = 35547074648064. Its totient is φ = 11838218915520.

The previous prime is 23687242721573. The next prime is 23687242721587. The reversal of 23687242721578 is 87512724278632.

It is a super-4 number, since 4×23687242721578⁴ (a number of 55 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (23687242721573) 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, 44587351 + ... + 45115477.

It is an arithmetic number, because the mean of its divisors is an integer number (2221692165504).

Almost surely, 2^{23687242721578} is an apocalyptic number.

23687242721578 is a deficient number, since it is larger than the sum of its proper divisors (11859831926486).

23687242721578 is a wasteful number, since it uses less digits than its factorization.

23687242721578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538317.

The product of its digits is 126443520, while the sum is 64.

The spelling of 23687242721578 in words is "twenty-three trillion, six hundred eighty-seven billion, two hundred forty-two million, seven hundred twenty-one thousand, five hundred seventy-eight".