10101981789 has 12 divisors (see below), whose sum is σ = 14595859356. Its totient is φ = 6732758592.

The previous prime is 10101981767. The next prime is 10101981821. The reversal of 10101981789 is 98718910101.

It can be written as a sum of positive squares in 2 ways, for example, as 4591146564 + 5510835225 = 67758^2 + 74235^2 .

It is not a de Polignac number, because 10101981789 - 2¹⁹ = 10101457501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10101911789) 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, 123862 + ... + 188535.

It is an arithmetic number, because the mean of its divisors is an integer number (1216321613).

Almost surely, 2^10101981789 is an apocalyptic number.

It is an amenable number.

10101981789 is a deficient number, since it is larger than the sum of its proper divisors (4493877567).

10101981789 is a wasteful number, since it uses less digits than its factorization.

10101981789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315996 (or 315993 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 45.

The spelling of 10101981789 in words is "ten billion, one hundred one million, nine hundred eighty-one thousand, seven hundred eighty-nine".