151685782561 has 2 divisors, whose sum is σ = 151685782562. Its totient is φ = 151685782560.

The previous prime is 151685782559. The next prime is 151685782601. The reversal of 151685782561 is 165287586151.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151663513600 + 22268961 = 389440^2 + 4719^2 .

It is an emirp because it is prime and its reverse (165287586151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151685782561 - 2¹ = 151685782559 is a prime.

It is a super-2 number, since 2×151685782561² (a number of 23 digits) contains 22 as substring.

Together with 151685782559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (151685788561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75842891280 + 75842891281.

It is an arithmetic number, because the mean of its divisors is an integer number (75842891281).

Almost surely, 2^151685782561 is an apocalyptic number.

It is an amenable number.

151685782561 is a deficient number, since it is larger than the sum of its proper divisors (1).

151685782561 is an equidigital number, since it uses as much as digits as its factorization.

151685782561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032000, while the sum is 55.

The spelling of 151685782561 in words is "one hundred fifty-one billion, six hundred eighty-five million, seven hundred eighty-two thousand, five hundred sixty-one".