1550204404540 has 48 divisors (see below), whose sum is σ = 3560898670560. Its totient is φ = 562199374080.

The previous prime is 1550204404459. The next prime is 1550204404549. The reversal of 1550204404540 is 454044020551.

It is a super-2 number, since 2×1550204404540² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1550204404496 and 1550204404505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550204404549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9363495 + ... + 9527614.

It is an arithmetic number, because the mean of its divisors is an integer number (74185388970).

Almost surely, 2^{1550204404540} is an apocalyptic number.

1550204404540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550204404540 is an abundant number, since it is smaller than the sum of its proper divisors (2010694266020).

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

1550204404540 is a wasteful number, since it uses less digits than its factorization.

1550204404540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18891502 (or 18891500 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 34.

The spelling of 1550204404540 in words is "one trillion, five hundred fifty billion, two hundred four million, four hundred four thousand, five hundred forty".