1556955151 has 2 divisors, whose sum is σ = 1556955152. Its totient is φ = 1556955150.

The previous prime is 1556955143. The next prime is 1556955157. The reversal of 1556955151 is 1515596551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1556955151 - 2³ = 1556955143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1556955098 and 1556955107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1556955157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778477575 + 778477576.

It is an arithmetic number, because the mean of its divisors is an integer number (778477576).

Almost surely, 2^1556955151 is an apocalyptic number.

1556955151 is a deficient number, since it is larger than the sum of its proper divisors (1).

1556955151 is an equidigital number, since it uses as much as digits as its factorization.

1556955151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168750, while the sum is 43.

The square root of 1556955151 is about 39458.2710087505. The cubic root of 1556955151 is about 1159.0229463454.

The spelling of 1556955151 in words is "one billion, five hundred fifty-six million, nine hundred fifty-five thousand, one hundred fifty-one".