1550726461 has 4 divisors (see below), whose sum is σ = 1553240412. Its totient is φ = 1548212512.

The previous prime is 1550726453. The next prime is 1550726473. The reversal of 1550726461 is 1646270551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1646270551 = 47 ⋅35027033.

It can be written as a sum of positive squares in 2 ways, for example, as 807128100 + 743598361 = 28410^2 + 27269^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550726461 - 2³ = 1550726453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1550726461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550726161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1256050 + ... + 1257283.

It is an arithmetic number, because the mean of its divisors is an integer number (388310103).

Almost surely, 2^1550726461 is an apocalyptic number.

It is an amenable number.

1550726461 is a deficient number, since it is larger than the sum of its proper divisors (2513951).

1550726461 is an equidigital number, since it uses as much as digits as its factorization.

1550726461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513950.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 1550726461 is about 39379.2643532101. The cubic root of 1550726461 is about 1157.4753010324.

The spelling of 1550726461 in words is "one billion, five hundred fifty million, seven hundred twenty-six thousand, four hundred sixty-one".