10155531887 has 4 divisors (see below), whose sum is σ = 10157535696. Its totient is φ = 10153528080.

The previous prime is 10155531857. The next prime is 10155531943. The reversal of 10155531887 is 78813555101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78813555101 = 60757 ⋅1297193.

It is a cyclic number.

It is not a de Polignac number, because 10155531887 - 2⁶ = 10155531823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10155531847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 994283 + ... + 1004444.

It is an arithmetic number, because the mean of its divisors is an integer number (2539383924).

Almost surely, 2^10155531887 is an apocalyptic number.

10155531887 is a deficient number, since it is larger than the sum of its proper divisors (2003809).

10155531887 is an equidigital number, since it uses as much as digits as its factorization.

10155531887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003808.

The product of its (nonzero) digits is 168000, while the sum is 44.

The spelling of 10155531887 in words is "ten billion, one hundred fifty-five million, five hundred thirty-one thousand, eight hundred eighty-seven".