1550061897 has 8 divisors (see below), whose sum is σ = 2072146944. Its totient is φ = 1030675728.

The previous prime is 1550061889. The next prime is 1550061913. The reversal of 1550061897 is 7981600551.

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

It is not a de Polignac number, because 1550061897 - 2³ = 1550061889 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1550061827) 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, 673378 + ... + 675675.

It is an arithmetic number, because the mean of its divisors is an integer number (259018368).

Almost surely, 2^1550061897 is an apocalyptic number.

It is an amenable number.

1550061897 is a deficient number, since it is larger than the sum of its proper divisors (522085047).

1550061897 is a wasteful number, since it uses less digits than its factorization.

1550061897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349439.

The product of its (nonzero) digits is 75600, while the sum is 42.

The square root of 1550061897 is about 39370.8254548974. The cubic root of 1550061897 is about 1157.3099320169.

The spelling of 1550061897 in words is "one billion, five hundred fifty million, sixty-one thousand, eight hundred ninety-seven".