151838395209 has 18 divisors (see below), whose sum is σ = 227746031370. Its totient is φ = 101225592432.

The previous prime is 151838395171. The next prime is 151838395259. The reversal of 151838395209 is 902593838151.

151838395209 is a `hidden beast` number, since 1 + 5 + 1 + 83 + 8 + 39 + 520 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 150850676025 + 987719184 = 388395^2 + 31428^2 .

It is not a de Polignac number, because 151838395209 - 2¹³ = 151838387017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (151838395259) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11564724 + ... + 11577845.

Almost surely, 2^151838395209 is an apocalyptic number.

It is an amenable number.

151838395209 is a deficient number, since it is larger than the sum of its proper divisors (75907636161).

151838395209 is an frugal number, since it uses more digits than its factorization.

151838395209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23142593 (or 23142572 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 151838395209 in words is "one hundred fifty-one billion, eight hundred thirty-eight million, three hundred ninety-five thousand, two hundred nine".