11505770253 has 16 divisors (see below), whose sum is σ = 17101120960. Its totient is φ = 7645522608.

The previous prime is 11505770251. The next prime is 11505770257. The reversal of 11505770253 is 35207750511.

It is a happy number.

11505770253 is a `hidden beast` number, since 11 + 50 + 577 + 0 + 25 + 3 = 666.

It is not a de Polignac number, because 11505770253 - 2¹ = 11505770251 is a prime.

It is a super-2 number, since 2×11505770253² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11505770251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 685750 + ... + 702327.

It is an arithmetic number, because the mean of its divisors is an integer number (1068820060).

Almost surely, 2^11505770253 is an apocalyptic number.

It is an amenable number.

11505770253 is a deficient number, since it is larger than the sum of its proper divisors (5595350707).

11505770253 is a wasteful number, since it uses less digits than its factorization.

11505770253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388393 (or 1388387 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The spelling of 11505770253 in words is "eleven billion, five hundred five million, seven hundred seventy thousand, two hundred fifty-three".