1550161540 has 24 divisors (see below), whose sum is σ = 3261585600. Its totient is φ = 618874848.

The previous prime is 1550161523. The next prime is 1550161577. The reversal of 1550161540 is 451610551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1550161499 and 1550161508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63640 + ... + 84559.

It is an arithmetic number, because the mean of its divisors is an integer number (135899400).

Almost surely, 2^1550161540 is an apocalyptic number.

1550161540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1550161540 is an abundant number, since it is smaller than the sum of its proper divisors (1711424060).

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

1550161540 is a wasteful number, since it uses less digits than its factorization.

1550161540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148731 (or 148729 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The square root of 1550161540 is about 39372.0908766603. The cubic root of 1550161540 is about 1157.3347300293.

The spelling of 1550161540 in words is "one billion, five hundred fifty million, one hundred sixty-one thousand, five hundred forty".