151327171781 has 2 divisors, whose sum is σ = 151327171782. Its totient is φ = 151327171780.

The previous prime is 151327171759. The next prime is 151327171817. The reversal of 151327171781 is 187171723151.

Together with next prime (151327171817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149540757025 + 1786414756 = 386705^2 + 42266^2 .

It is a cyclic number.

It is not a de Polignac number, because 151327171781 - 2¹⁸ = 151326909637 is a prime.

It is a super-2 number, since 2×151327171781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151327171711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75663585890 + 75663585891.

It is an arithmetic number, because the mean of its divisors is an integer number (75663585891).

Almost surely, 2^151327171781 is an apocalyptic number.

It is an amenable number.

151327171781 is a deficient number, since it is larger than the sum of its proper divisors (1).

151327171781 is an equidigital number, since it uses as much as digits as its factorization.

151327171781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82320, while the sum is 44.

The spelling of 151327171781 in words is "one hundred fifty-one billion, three hundred twenty-seven million, one hundred seventy-one thousand, seven hundred eighty-one".