151279305781 has 4 divisors (see below), whose sum is σ = 160178088492. Its totient is φ = 142380523072.

The previous prime is 151279305769. The next prime is 151279305787. The reversal of 151279305781 is 187503972151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 187503972151 = 37 ⋅5067674923.

It can be written as a sum of positive squares in 2 ways, for example, as 48911303281 + 102368002500 = 221159^2 + 319950^2 .

It is a cyclic number.

It is not a de Polignac number, because 151279305781 - 2¹¹ = 151279303733 is a prime.

It is a super-2 number, since 2×151279305781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151279305787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4449391330 + ... + 4449391363.

It is an arithmetic number, because the mean of its divisors is an integer number (40044522123).

Almost surely, 2^151279305781 is an apocalyptic number.

It is an amenable number.

151279305781 is a deficient number, since it is larger than the sum of its proper divisors (8898782711).

151279305781 is an equidigital number, since it uses as much as digits as its factorization.

151279305781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8898782710.

The product of its (nonzero) digits is 529200, while the sum is 49.

The spelling of 151279305781 in words is "one hundred fifty-one billion, two hundred seventy-nine million, three hundred five thousand, seven hundred eighty-one".