149799905281 has 8 divisors (see below), whose sum is σ = 163532879720. Its totient is φ = 136382631552.

The previous prime is 149799905273. The next prime is 149799905287. The reversal of 149799905281 is 182509997941.

It can be written as a sum of positive squares in 4 ways, for example, as 7701817600 + 142098087681 = 87760^2 + 376959^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 149799905281 - 2³ = 149799905273 is a prime.

It is a super-2 number, since 2×149799905281² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149799905287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78924186 + ... + 78926083.

It is an arithmetic number, because the mean of its divisors is an integer number (20441609965).

Almost surely, 2^149799905281 is an apocalyptic number.

It is an amenable number.

149799905281 is a deficient number, since it is larger than the sum of its proper divisors (13732974439).

149799905281 is a wasteful number, since it uses less digits than its factorization.

149799905281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157850355.

The product of its (nonzero) digits is 14696640, while the sum is 64.

The spelling of 149799905281 in words is "one hundred forty-nine billion, seven hundred ninety-nine million, nine hundred five thousand, two hundred eighty-one".