11503623061 has 4 divisors (see below), whose sum is σ = 13146997792. Its totient is φ = 9860248332.

The previous prime is 11503623059. The next prime is 11503623091. The reversal of 11503623061 is 16032630511.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16032630511 = 151 ⋅106176361.

It is a cyclic number.

It is not a de Polignac number, because 11503623061 - 2¹ = 11503623059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11503623041) 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, 821687355 + ... + 821687368.

It is an arithmetic number, because the mean of its divisors is an integer number (3286749448).

Almost surely, 2^11503623061 is an apocalyptic number.

It is an amenable number.

11503623061 is a deficient number, since it is larger than the sum of its proper divisors (1643374731).

11503623061 is an equidigital number, since it uses as much as digits as its factorization.

11503623061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643374730.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 11503623061 in words is "eleven billion, five hundred three million, six hundred twenty-three thousand, sixty-one".