1626372961 has 4 divisors (see below), whose sum is σ = 1664195632. Its totient is φ = 1588550292.

The previous prime is 1626372947. The next prime is 1626372989. The reversal of 1626372961 is 1692736261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1626372961 - 2⁷ = 1626372833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 37822627 = 1626372961 / (1 + 6 + 2 + 6 + 3 + 7 + 2 + 9 + 6 + 1).

It is not an unprimeable number, because it can be changed into a prime (1626370961) 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, 18911271 + ... + 18911356.

It is an arithmetic number, because the mean of its divisors is an integer number (416048908).

Almost surely, 2^1626372961 is an apocalyptic number.

It is an amenable number.

1626372961 is a deficient number, since it is larger than the sum of its proper divisors (37822671).

1626372961 is an equidigital number, since it uses as much as digits as its factorization.

1626372961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37822670.

The product of its digits is 163296, while the sum is 43.

The square root of 1626372961 is about 40328.3146312860. The cubic root of 1626372961 is about 1175.9983574047.

The spelling of 1626372961 in words is "one billion, six hundred twenty-six million, three hundred seventy-two thousand, nine hundred sixty-one".