156738551 has 2 divisors, whose sum is σ = 156738552. Its totient is φ = 156738550.

The previous prime is 156738509. The next prime is 156738553. The reversal of 156738551 is 155837651.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156738551 is a prime.

Together with 156738553, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 156738499 and 156738508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156738553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78369275 + 78369276.

It is an arithmetic number, because the mean of its divisors is an integer number (78369276).

Almost surely, 2^156738551 is an apocalyptic number.

156738551 is a deficient number, since it is larger than the sum of its proper divisors (1).

156738551 is an equidigital number, since it uses as much as digits as its factorization.

156738551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 126000, while the sum is 41.

The square root of 156738551 is about 12519.5267881817. The cubic root of 156738551 is about 539.1694491003.

The spelling of 156738551 in words is "one hundred fifty-six million, seven hundred thirty-eight thousand, five hundred fifty-one".