1601553630 has 16 divisors (see below), whose sum is σ = 3843728784. Its totient is φ = 427080960.

The previous prime is 1601553581. The next prime is 1601553631. The reversal of 1601553630 is 363551061.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 53385121 = 1601553630 / (1 + 6 + 0 + 1 + 5 + 5 + 3 + 6 + 3 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601553631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26692531 + ... + 26692590.

It is an arithmetic number, because the mean of its divisors is an integer number (240233049).

Almost surely, 2^1601553630 is an apocalyptic number.

1601553630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1601553630 is an abundant number, since it is smaller than the sum of its proper divisors (2242175154).

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

1601553630 is a wasteful number, since it uses less digits than its factorization.

1601553630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53385131.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 1601553630 is about 40019.4156629004. The cubic root of 1601553630 is about 1169.9855429582.

The spelling of 1601553630 in words is "one billion, six hundred one million, five hundred fifty-three thousand, six hundred thirty".