2156061463 has 4 divisors (see below), whose sum is σ = 2230408440. Its totient is φ = 2081714488.

The previous prime is 2156061437. The next prime is 2156061487. The reversal of 2156061463 is 3641606512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2156061463 - 2¹⁷ = 2155930391 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 (2156061403) 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, 37173445 + ... + 37173502.

It is an arithmetic number, because the mean of its divisors is an integer number (557602110).

Almost surely, 2^2156061463 is an apocalyptic number.

2156061463 is a deficient number, since it is larger than the sum of its proper divisors (74346977).

2156061463 is an equidigital number, since it uses as much as digits as its factorization.

2156061463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74346976.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 2156061463 is about 46433.4089099648. The cubic root of 2156061463 is about 1291.8746581543.

Adding to 2156061463 its reverse (3641606512), we get a palindrome (5797667975).

The spelling of 2156061463 in words is "two billion, one hundred fifty-six million, sixty-one thousand, four hundred sixty-three".