87561089123 has 8 divisors (see below), whose sum is σ = 88647959568. Its totient is φ = 86474978784.

The previous prime is 87561089101. The next prime is 87561089131. The reversal of 87561089123 is 32198016578.

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

It is a cyclic number.

It is not a de Polignac number, because 87561089123 - 2¹⁸ = 87560826979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87561089173) 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, 43565 + ... + 420737.

It is an arithmetic number, because the mean of its divisors is an integer number (11080994946).

Almost surely, 2^87561089123 is an apocalyptic number.

87561089123 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

87561089123 is a deficient number, since it is larger than the sum of its proper divisors (1086870445).

87561089123 is a wasteful number, since it uses less digits than its factorization.

87561089123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380053.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 87561089123 in words is "eighty-seven billion, five hundred sixty-one million, eighty-nine thousand, one hundred twenty-three".