101193989465 has 4 divisors (see below), whose sum is σ = 121432787364. Its totient is φ = 80955191568.

The previous prime is 101193989461. The next prime is 101193989513. The reversal of 101193989465 is 564989391101.

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 17145021721 + 84048967744 = 130939^2 + 289912^2 .

It is a cyclic number.

It is not a de Polignac number, because 101193989465 - 2² = 101193989461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101193989465.

It is not an unprimeable number, because it can be changed into a prime (101193989461) 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, 10119398942 + ... + 10119398951.

It is an arithmetic number, because the mean of its divisors is an integer number (30358196841).

Almost surely, 2^101193989465 is an apocalyptic number.

It is an amenable number.

101193989465 is a deficient number, since it is larger than the sum of its proper divisors (20238797899).

101193989465 is an equidigital number, since it uses as much as digits as its factorization.

101193989465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20238797898.

The product of its (nonzero) digits is 2099520, while the sum is 56.

The spelling of 101193989465 in words is "one hundred one billion, one hundred ninety-three million, nine hundred eighty-nine thousand, four hundred sixty-five".