154991494 has 8 divisors (see below), whose sum is σ = 265699728. Its totient is φ = 66424920.

The previous prime is 154991489. The next prime is 154991513. The reversal of 154991494 is 494199451.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5535397 + ... + 5535424.

It is an arithmetic number, because the mean of its divisors is an integer number (33212466).

Almost surely, 2^154991494 is an apocalyptic number.

154991494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

154991494 is a deficient number, since it is larger than the sum of its proper divisors (110708234).

154991494 is a wasteful number, since it uses less digits than its factorization.

154991494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11070830.

The product of its digits is 233280, while the sum is 46.

The square root of 154991494 is about 12449.5579841214. The cubic root of 154991494 is about 537.1587091737.

The spelling of 154991494 in words is "one hundred fifty-four million, nine hundred ninety-one thousand, four hundred ninety-four".