1553149950 has 144 divisors (see below), whose sum is σ = 4288975488. Its totient is φ = 371624000.

The previous prime is 1553149943. The next prime is 1553150021. The reversal of 1553149950 is 599413551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1505935 + ... + 1506965.

It is an arithmetic number, because the mean of its divisors is an integer number (29784552).

Almost surely, 2^1553149950 is an apocalyptic number.

1553149950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1553149950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2144487744).

1553149950 is an abundant number, since it is smaller than the sum of its proper divisors (2735825538).

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

1553149950 is a wasteful number, since it uses less digits than its factorization.

1553149950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1135 counting only the distinct ones).

The product of its (nonzero) digits is 121500, while the sum is 42.

The square root of 1553149950 is about 39410.0234711932. The cubic root of 1553149950 is about 1158.0779580676.

The spelling of 1553149950 in words is "one billion, five hundred fifty-three million, one hundred forty-nine thousand, nine hundred fifty".