149217231993 has 16 divisors (see below), whose sum is σ = 203043459840. Its totient is φ = 97446496464.

The previous prime is 149217231973. The next prime is 149217232009. The reversal of 149217231993 is 399132712941.

It is not a de Polignac number, because 149217231993 - 2¹² = 149217227897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (149217231913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1439371 + ... + 1539552.

It is an arithmetic number, because the mean of its divisors is an integer number (12690216240).

Almost surely, 2^149217231993 is an apocalyptic number.

It is an amenable number.

149217231993 is a deficient number, since it is larger than the sum of its proper divisors (53826227847).

149217231993 is a wasteful number, since it uses less digits than its factorization.

149217231993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979268.

The product of its digits is 734832, while the sum is 51.

The spelling of 149217231993 in words is "one hundred forty-nine billion, two hundred seventeen million, two hundred thirty-one thousand, nine hundred ninety-three".