11780346157 has 4 divisors (see below), whose sum is σ = 12186565020. Its totient is φ = 11374127296.

The previous prime is 11780346101. The next prime is 11780346181. The reversal of 11780346157 is 75164308711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75164308711 = 37 ⋅2031467803.

It can be written as a sum of positive squares in 2 ways, for example, as 2143782601 + 9636563556 = 46301^2 + 98166^2 .

It is a cyclic number.

It is not a de Polignac number, because 11780346157 - 2⁷ = 11780346029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11780346187) 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, 203109388 + ... + 203109445.

It is an arithmetic number, because the mean of its divisors is an integer number (3046641255).

Almost surely, 2^11780346157 is an apocalyptic number.

It is an amenable number.

11780346157 is a deficient number, since it is larger than the sum of its proper divisors (406218863).

11780346157 is an equidigital number, since it uses as much as digits as its factorization.

11780346157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406218862.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 11780346157 in words is "eleven billion, seven hundred eighty million, three hundred forty-six thousand, one hundred fifty-seven".