1550537980 has 12 divisors (see below), whose sum is σ = 3256129800. Its totient is φ = 620215184.

The previous prime is 1550537957. The next prime is 1550537981. The reversal of 1550537980 is 897350551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550537981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38763430 + ... + 38763469.

It is an arithmetic number, because the mean of its divisors is an integer number (271344150).

Almost surely, 2^1550537980 is an apocalyptic number.

1550537980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550537980 is an abundant number, since it is smaller than the sum of its proper divisors (1705591820).

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

1550537980 is a wasteful number, since it uses less digits than its factorization.

1550537980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77526908 (or 77526906 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 43.

The square root of 1550537980 is about 39376.8711301444. The cubic root of 1550537980 is about 1157.4284045300.

The spelling of 1550537980 in words is "one billion, five hundred fifty million, five hundred thirty-seven thousand, nine hundred eighty".