149773921478 has 16 divisors (see below), whose sum is σ = 236346930000. Its totient is φ = 71079147552.

The previous prime is 149773921471. The next prime is 149773921483. The reversal of 149773921478 is 874129377941.

It is a self number, because there is not a number n which added to its sum of digits gives 149773921478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149773921471) 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, 21880553 + ... + 21887396.

It is an arithmetic number, because the mean of its divisors is an integer number (14771683125).

Almost surely, 2^149773921478 is an apocalyptic number.

149773921478 is a deficient number, since it is larger than the sum of its proper divisors (86573008522).

149773921478 is a wasteful number, since it uses less digits than its factorization.

149773921478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43768039.

The product of its digits is 21337344, while the sum is 62.

The spelling of 149773921478 in words is "one hundred forty-nine billion, seven hundred seventy-three million, nine hundred twenty-one thousand, four hundred seventy-eight".