4645625561 has 4 divisors (see below), whose sum is σ = 4650352512. Its totient is φ = 4640898612.

The previous prime is 4645625557. The next prime is 4645625563. The reversal of 4645625561 is 1655265464.

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 4645625561 - 2² = 4645625557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4645625563) 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, 2362001 + ... + 2363966.

It is an arithmetic number, because the mean of its divisors is an integer number (1162588128).

Almost surely, 2^4645625561 is an apocalyptic number.

It is an amenable number.

4645625561 is a deficient number, since it is larger than the sum of its proper divisors (4726951).

4645625561 is an equidigital number, since it uses as much as digits as its factorization.

4645625561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4726950.

The product of its digits is 864000, while the sum is 44.

The square root of 4645625561 is about 68158.8259948776. The cubic root of 4645625561 is about 1668.5839719496.

The spelling of 4645625561 in words is "four billion, six hundred forty-five million, six hundred twenty-five thousand, five hundred sixty-one".