1620363625 has 16 divisors (see below), whose sum is σ = 2069248896. Its totient is φ = 1266140400.

The previous prime is 1620363601. The next prime is 1620363649. The reversal of 1620363625 is 5263630261.

It is an interprime number because it is at equal distance from previous prime (1620363601) and next prime (1620363649).

It is not a de Polignac number, because 1620363625 - 2¹³ = 1620355433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 145357 + ... + 156106.

It is an arithmetic number, because the mean of its divisors is an integer number (129328056).

Almost surely, 2^1620363625 is an apocalyptic number.

It is an amenable number.

1620363625 is a deficient number, since it is larger than the sum of its proper divisors (448885271).

1620363625 is an equidigital number, since it uses as much as digits as its factorization.

1620363625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301521 (or 301511 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 1620363625 is about 40253.7405094235. The cubic root of 1620363625 is about 1174.5481588476.

Adding to 1620363625 its reverse (5263630261), we get a palindrome (6883993886).

The spelling of 1620363625 in words is "one billion, six hundred twenty million, three hundred sixty-three thousand, six hundred twenty-five".