1553062961 has 4 divisors (see below), whose sum is σ = 1568439924. Its totient is φ = 1537686000.

The previous prime is 1553062919. The next prime is 1553062963. The reversal of 1553062961 is 1692603551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1391290000 + 161772961 = 37300^2 + 12719^2 .

It is a cyclic number.

It is not a de Polignac number, because 1553062961 - 2²⁶ = 1485954097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1553062963) 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, 7688330 + ... + 7688531.

It is an arithmetic number, because the mean of its divisors is an integer number (392109981).

Almost surely, 2^1553062961 is an apocalyptic number.

It is an amenable number.

1553062961 is a deficient number, since it is larger than the sum of its proper divisors (15376963).

1553062961 is a wasteful number, since it uses less digits than its factorization.

1553062961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15376962.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 1553062961 is about 39408.9198151890. The cubic root of 1553062961 is about 1158.0563370764.

The spelling of 1553062961 in words is "one billion, five hundred fifty-three million, sixty-two thousand, nine hundred sixty-one".