1550121408 has 112 divisors (see below), whose sum is σ = 4971409920. Its totient is φ = 469728000.

The previous prime is 1550121407. The next prime is 1550121413. The reversal of 1550121408 is 8041210551.

1550121408 is a `hidden beast` number, since 15 + 501 + 2 + 140 + 8 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550121407) 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, 21768 + ... + 59783.

Almost surely, 2^1550121408 is an apocalyptic number.

1550121408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1550121408 is an abundant number, since it is smaller than the sum of its proper divisors (3421288512).

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

1550121408 is a wasteful number, since it uses less digits than its factorization.

1550121408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81583 (or 81567 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 1550121408 is about 39371.5812230091. The cubic root of 1550121408 is about 1157.3247425631.

Adding to 1550121408 its reverse (8041210551), we get a palindrome (9591331959).

The spelling of 1550121408 in words is "one billion, five hundred fifty million, one hundred twenty-one thousand, four hundred eight".