1550415297920 has 256 divisors, whose sum is σ = 3955496760000. Its totient is φ = 579994877952.

The previous prime is 1550415297913. The next prime is 1550415297941. The reversal of 1550415297920 is 297925140551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157253951 + ... + 157263809.

Almost surely, 2^{1550415297920} is an apocalyptic number.

1550415297920 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 1550415297920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1977748380000).

1550415297920 is an abundant number, since it is smaller than the sum of its proper divisors (2405081462080).

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

1550415297920 is a wasteful number, since it uses less digits than its factorization.

1550415297920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10173 (or 10161 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 50.

The spelling of 1550415297920 in words is "one trillion, five hundred fifty billion, four hundred fifteen million, two hundred ninety-seven thousand, nine hundred twenty".