1157778463 has 4 divisors (see below), whose sum is σ = 1158976720. Its totient is φ = 1156580208.

The previous prime is 1157778449. The next prime is 1157778473. The reversal of 1157778463 is 3648777511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3648777511 = 97 ⋅37616263.

It is a cyclic number.

It is not a de Polignac number, because 1157778463 - 2⁵ = 1157778431 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 (1157778403) 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, 597678 + ... + 599611.

It is an arithmetic number, because the mean of its divisors is an integer number (289744180).

Almost surely, 2^1157778463 is an apocalyptic number.

1157778463 is a deficient number, since it is larger than the sum of its proper divisors (1198257).

1157778463 is an equidigital number, since it uses as much as digits as its factorization.

1157778463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198256.

The product of its digits is 987840, while the sum is 49.

The square root of 1157778463 is about 34026.1438161893. The cubic root of 1157778463 is about 1050.0463964381.

The spelling of 1157778463 in words is "one billion, one hundred fifty-seven million, seven hundred seventy-eight thousand, four hundred sixty-three".