153997420944499 has 6 divisors (see below), whose sum is σ = 169269892443260. Its totient is φ = 139997655403980.

The previous prime is 153997420944431. The next prime is 153997420944509. The reversal of 153997420944499 is 994449024799351.

It is not a de Polignac number, because 153997420944499 - 2²¹ = 153997418847347 is a prime.

It is a super-2 number, since 2×153997420944499² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153997420944599) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 636352978989 + ... + 636352979230.

Almost surely, 2^{153997420944499} is an apocalyptic number.

153997420944499 is a deficient number, since it is larger than the sum of its proper divisors (15272471498761).

153997420944499 is a wasteful number, since it uses less digits than its factorization.

153997420944499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272705958241 (or 1272705958230 counting only the distinct ones).

The product of its (nonzero) digits is 3174474240, while the sum is 79.

The spelling of 153997420944499 in words is "one hundred fifty-three trillion, nine hundred ninety-seven billion, four hundred twenty million, nine hundred forty-four thousand, four hundred ninety-nine".