154478515940 has 96 divisors (see below), whose sum is σ = 381639734784. Its totient is φ = 51428782080.

The previous prime is 154478515813. The next prime is 154478515943. The reversal of 154478515940 is 49515874451.

It is a happy number.

It is a super-2 number, since 2×154478515940² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is not an unprimeable number, because it can be changed into a prime (154478515943) 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, 612425 + ... + 827055.

It is an arithmetic number, because the mean of its divisors is an integer number (3975413904).

Almost surely, 2^154478515940 is an apocalyptic number.

154478515940 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 154478515940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190819867392).

154478515940 is an abundant number, since it is smaller than the sum of its proper divisors (227161218844).

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

154478515940 is a wasteful number, since it uses less digits than its factorization.

154478515940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214797 (or 214795 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 53.

The spelling of 154478515940 in words is "one hundred fifty-four billion, four hundred seventy-eight million, five hundred fifteen thousand, nine hundred forty".