149388721894 has 8 divisors (see below), whose sum is σ = 224233782048. Its totient is φ = 74644127880.

The previous prime is 149388721891. The next prime is 149388721903. The reversal of 149388721894 is 498127883941.

149388721894 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149388721891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25112817 + ... + 25118764.

It is an arithmetic number, because the mean of its divisors is an integer number (28029222756).

Almost surely, 2^149388721894 is an apocalyptic number.

149388721894 is a deficient number, since it is larger than the sum of its proper divisors (74845060154).

149388721894 is a wasteful number, since it uses less digits than its factorization.

149388721894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50233070.

The product of its digits is 27869184, while the sum is 64.

The spelling of 149388721894 in words is "one hundred forty-nine billion, three hundred eighty-eight million, seven hundred twenty-one thousand, eight hundred ninety-four".