154777947940 has 48 divisors (see below), whose sum is σ = 405236813184. Its totient is φ = 48242476800.

The previous prime is 154777947917. The next prime is 154777947983. The reversal of 154777947940 is 49749777451.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50251041 + ... + 50254120.

It is an arithmetic number, because the mean of its divisors is an integer number (8442433608).

Almost surely, 2^154777947940 is an apocalyptic number.

154777947940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154777947940 is an abundant number, since it is smaller than the sum of its proper divisors (250458865244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

154777947940 is a wasteful number, since it uses less digits than its factorization.

154777947940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100505188 (or 100505186 counting only the distinct ones).

The product of its (nonzero) digits is 62233920, while the sum is 64.

The spelling of 154777947940 in words is "one hundred fifty-four billion, seven hundred seventy-seven million, nine hundred forty-seven thousand, nine hundred forty".