154239780420 has 960 divisors, whose sum is σ = 595750256640. Its totient is φ = 32920473600.

The previous prime is 154239780419. The next prime is 154239780421. The reversal of 154239780420 is 24087932451.

154239780420 is a `hidden beast` number, since 1 + 542 + 3 + 9 + 7 + 80 + 4 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (154239780419) and next prime (154239780421).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (154239780421) by changing a digit.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 730994115 + ... + 730994325.

It is an arithmetic number, because the mean of its divisors is an integer number (620573184).

Almost surely, 2^154239780420 is an apocalyptic number.

154239780420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154239780420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297875128320).

154239780420 is an abundant number, since it is smaller than the sum of its proper divisors (441510476220).

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

154239780420 is a wasteful number, since it uses less digits than its factorization.

154239780420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 154239780420 in words is "one hundred fifty-four billion, two hundred thirty-nine million, seven hundred eighty thousand, four hundred twenty".