6156124421 has 2 divisors, whose sum is σ = 6156124422. Its totient is φ = 6156124420.

The previous prime is 6156124349. The next prime is 6156124451. The reversal of 6156124421 is 1244216516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5935007521 + 221116900 = 77039^2 + 14870^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6156124421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6156124451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3078062210 + 3078062211.

It is an arithmetic number, because the mean of its divisors is an integer number (3078062211).

Almost surely, 2^6156124421 is an apocalyptic number.

It is an amenable number.

6156124421 is a deficient number, since it is larger than the sum of its proper divisors (1).

6156124421 is an equidigital number, since it uses as much as digits as its factorization.

6156124421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 6156124421 is about 78460.9738723654. The cubic root of 6156124421 is about 1832.7467705423.

The spelling of 6156124421 in words is "six billion, one hundred fifty-six million, one hundred twenty-four thousand, four hundred twenty-one".