10187978701 has 4 divisors (see below), whose sum is σ = 10203028092. Its totient is φ = 10172929312.

The previous prime is 10187978699. The next prime is 10187978711. The reversal of 10187978701 is 10787978101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5350776201 + 4837202500 = 73149^2 + 69550^2 .

It is a cyclic number.

It is not a de Polignac number, because 10187978701 - 2¹ = 10187978699 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10187978711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7523680 + ... + 7525033.

It is an arithmetic number, because the mean of its divisors is an integer number (2550757023).

Almost surely, 2^10187978701 is an apocalyptic number.

It is an amenable number.

10187978701 is a deficient number, since it is larger than the sum of its proper divisors (15049391).

10187978701 is an equidigital number, since it uses as much as digits as its factorization.

10187978701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15049390.

The product of its (nonzero) digits is 197568, while the sum is 49.

The spelling of 10187978701 in words is "ten billion, one hundred eighty-seven million, nine hundred seventy-eight thousand, seven hundred one".