149618481621 has 16 divisors (see below), whose sum is σ = 227995682304. Its totient is φ = 85494169584.

The previous prime is 149618481611. The next prime is 149618481631. The reversal of 149618481621 is 126184816941.

It is an interprime number because it is at equal distance from previous prime (149618481611) and next prime (149618481631).

It is not a de Polignac number, because 149618481621 - 2⁶ = 149618481557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149618481611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1284030 + ... + 1395696.

It is an arithmetic number, because the mean of its divisors is an integer number (14249730144).

Almost surely, 2^149618481621 is an apocalyptic number.

It is an amenable number.

149618481621 is a deficient number, since it is larger than the sum of its proper divisors (78377200683).

149618481621 is a wasteful number, since it uses less digits than its factorization.

149618481621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175480.

The product of its digits is 663552, while the sum is 51.

The spelling of 149618481621 in words is "one hundred forty-nine billion, six hundred eighteen million, four hundred eighty-one thousand, six hundred twenty-one".