151878357109 has 2 divisors, whose sum is σ = 151878357110. Its totient is φ = 151878357108.

The previous prime is 151878357101. The next prime is 151878357121. The reversal of 151878357109 is 901753878151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148496934609 + 3381422500 = 385353^2 + 58150^2 .

It is a cyclic number.

It is not a de Polignac number, because 151878357109 - 2³ = 151878357101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 151878357109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151878357101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75939178554 + 75939178555.

It is an arithmetic number, because the mean of its divisors is an integer number (75939178555).

Almost surely, 2^151878357109 is an apocalyptic number.

It is an amenable number.

151878357109 is a deficient number, since it is larger than the sum of its proper divisors (1).

151878357109 is an equidigital number, since it uses as much as digits as its factorization.

151878357109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2116800, while the sum is 55.

The spelling of 151878357109 in words is "one hundred fifty-one billion, eight hundred seventy-eight million, three hundred fifty-seven thousand, one hundred nine".