64199458661401 has 4 divisors (see below), whose sum is σ = 73370809898752. Its totient is φ = 55028107424052.

The previous prime is 64199458661279. The next prime is 64199458661407. The reversal of 64199458661401 is 10416685499146.

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 not a de Polignac number, because 64199458661401 - 2¹¹ = 64199458659353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64199458661407) 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, 4585675618665 + ... + 4585675618678.

It is an arithmetic number, because the mean of its divisors is an integer number (18342702474688).

Almost surely, 2^{64199458661401} is an apocalyptic number.

It is an amenable number.

64199458661401 is a deficient number, since it is larger than the sum of its proper divisors (9171351237351).

64199458661401 is an equidigital number, since it uses as much as digits as its factorization.

64199458661401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9171351237350.

The product of its (nonzero) digits is 44789760, while the sum is 64.

The spelling of 64199458661401 in words is "sixty-four trillion, one hundred ninety-nine billion, four hundred fifty-eight million, six hundred sixty-one thousand, four hundred one".