1625644364 has 6 divisors (see below), whose sum is σ = 2844877644. Its totient is φ = 812822180.

The previous prime is 1625644343. The next prime is 1625644367. The reversal of 1625644364 is 4634465261.

It is not an unprimeable number, because it can be changed into a prime (1625644367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203205542 + ... + 203205549.

It is an arithmetic number, because the mean of its divisors is an integer number (474146274).

Almost surely, 2^1625644364 is an apocalyptic number.

It is an amenable number.

1625644364 is a deficient number, since it is larger than the sum of its proper divisors (1219233280).

1625644364 is a wasteful number, since it uses less digits than its factorization.

1625644364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406411095 (or 406411093 counting only the distinct ones).

The product of its digits is 414720, while the sum is 41.

The square root of 1625644364 is about 40319.2803011165. The cubic root of 1625644364 is about 1175.8227197788.

The spelling of 1625644364 in words is "one billion, six hundred twenty-five million, six hundred forty-four thousand, three hundred sixty-four".