1550420641 has 8 divisors (see below), whose sum is σ = 1932992064. Its totient is φ = 1208119920.

The previous prime is 1550420633. The next prime is 1550420747. The reversal of 1550420641 is 1460240551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1550420641 - 2³ = 1550420633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1550426641) 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, 10067590 + ... + 10067743.

It is an arithmetic number, because the mean of its divisors is an integer number (241624008).

Almost surely, 2^1550420641 is an apocalyptic number.

1550420641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1550420641 is a deficient number, since it is larger than the sum of its proper divisors (382571423).

1550420641 is a wasteful number, since it uses less digits than its factorization.

1550420641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20135351.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 1550420641 is about 39375.3811537108. The cubic root of 1550420641 is about 1157.3992071548.

The spelling of 1550420641 in words is "one billion, five hundred fifty million, four hundred twenty thousand, six hundred forty-one".