190648000621 has 4 divisors (see below), whose sum is σ = 205313231452. Its totient is φ = 175982769792.

The previous prime is 190648000589. The next prime is 190648000657. The reversal of 190648000621 is 126000846091.

It is a happy number.

It is the 178255-th star number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 126000846091 = 35171 ⋅3582521.

It can be written as a sum of positive squares in 2 ways, for example, as 101387475396 + 89260525225 = 318414^2 + 298765^2 .

It is a cyclic number.

It is not a de Polignac number, because 190648000621 - 2⁵ = 190648000589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190648000121) 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, 7332615396 + ... + 7332615421.

It is an arithmetic number, because the mean of its divisors is an integer number (51328307863).

Almost surely, 2^190648000621 is an apocalyptic number.

It is an amenable number.

190648000621 is a deficient number, since it is larger than the sum of its proper divisors (14665230831).

190648000621 is a wasteful number, since it uses less digits than its factorization.

190648000621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14665230830.

The product of its (nonzero) digits is 20736, while the sum is 37.

The spelling of 190648000621 in words is "one hundred ninety billion, six hundred forty-eight million, six hundred twenty-one", and thus it is an aban number.