1550154045420 has 144 divisors (see below), whose sum is σ = 4789601500320. Its totient is φ = 405707731968.

The previous prime is 1550154045413. The next prime is 1550154045421. The reversal of 1550154045420 is 245404510551.

1550154045420 is a `hidden beast` number, since 1 + 5 + 50 + 1 + 540 + 45 + 4 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1550154045421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6434254 + ... + 6670826.

It is an arithmetic number, because the mean of its divisors is an integer number (33261121530).

Almost surely, 2^{1550154045420} is an apocalyptic number.

1550154045420 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 1550154045420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2394800750160).

1550154045420 is an abundant number, since it is smaller than the sum of its proper divisors (3239447454900).

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

1550154045420 is a wasteful number, since it uses less digits than its factorization.

1550154045420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237264 (or 237259 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

Adding to 1550154045420 its reverse (245404510551), we get a palindrome (1795558555971).

The spelling of 1550154045420 in words is "one trillion, five hundred fifty billion, one hundred fifty-four million, forty-five thousand, four hundred twenty".