140268011521 has 4 divisors (see below), whose sum is σ = 153019648944. Its totient is φ = 127516374100.

The previous prime is 140268011503. The next prime is 140268011549. The reversal of 140268011521 is 125110862041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140268011521 is a prime.

It is a super-3 number, since 3×140268011521³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140268011591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6375818695 + ... + 6375818716.

It is an arithmetic number, because the mean of its divisors is an integer number (38254912236).

It is a Proth number, since it is equal to 66885 ⋅ 2²¹ + 1 and 66885 < 2²¹.

Almost surely, 2^140268011521 is an apocalyptic number.

140268011521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

140268011521 is a deficient number, since it is larger than the sum of its proper divisors (12751637423).

140268011521 is a wasteful number, since it uses less digits than its factorization.

140268011521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12751637422.

The product of its (nonzero) digits is 3840, while the sum is 31.

Adding to 140268011521 its reverse (125110862041), we get a palindrome (265378873562).

The spelling of 140268011521 in words is "one hundred forty billion, two hundred sixty-eight million, eleven thousand, five hundred twenty-one".