10091897851 has 12 divisors (see below), whose sum is σ = 11961058752. Its totient is φ = 8486984688.

The previous prime is 10091897843. The next prime is 10091897863. The reversal of 10091897851 is 15879819001.

It is a happy number.

It is not a de Polignac number, because 10091897851 - 2³ = 10091897843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10091897795 and 10091897804.

It is not an unprimeable number, because it can be changed into a prime (10091897831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1940395 + ... + 1945588.

It is an arithmetic number, because the mean of its divisors is an integer number (996754896).

Almost surely, 2^10091897851 is an apocalyptic number.

10091897851 is a deficient number, since it is larger than the sum of its proper divisors (1869160901).

10091897851 is an equidigital number, since it uses as much as digits as its factorization.

10091897851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3886050 (or 3886043 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 49.

The spelling of 10091897851 in words is "ten billion, ninety-one million, eight hundred ninety-seven thousand, eight hundred fifty-one".