61805254601 has 4 divisors (see below), whose sum is σ = 61813290000. Its totient is φ = 61797219204.

The previous prime is 61805254597. The next prime is 61805254627. The reversal of 61805254601 is 10645250816.

It is a happy number.

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 61805254601 - 2² = 61805254597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61805254201) 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, 4006151 + ... + 4021548.

It is an arithmetic number, because the mean of its divisors is an integer number (15453322500).

Almost surely, 2^61805254601 is an apocalyptic number.

It is an amenable number.

61805254601 is a deficient number, since it is larger than the sum of its proper divisors (8035399).

61805254601 is an equidigital number, since it uses as much as digits as its factorization.

61805254601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8035398.

The product of its (nonzero) digits is 57600, while the sum is 38.

The spelling of 61805254601 in words is "sixty-one billion, eight hundred five million, two hundred fifty-four thousand, six hundred one".