1949154459 has 32 divisors (see below), whose sum is σ = 3027425280. Its totient is φ = 1092528000.

The previous prime is 1949154443. The next prime is 1949154461. The reversal of 1949154459 is 9544519491.

It is not a de Polignac number, because 1949154459 - 2⁴ = 1949154443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1949154059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226974 + ... + 235404.

It is an arithmetic number, because the mean of its divisors is an integer number (94607040).

Almost surely, 2^1949154459 is an apocalyptic number.

1949154459 is a deficient number, since it is larger than the sum of its proper divisors (1078270821).

1949154459 is a wasteful number, since it uses less digits than its factorization.

1949154459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8651.

The product of its digits is 1166400, while the sum is 51.

The square root of 1949154459 is about 44149.2294270240. The cubic root of 1949154459 is about 1249.1523766109.

The spelling of 1949154459 in words is "one billion, nine hundred forty-nine million, one hundred fifty-four thousand, four hundred fifty-nine".