49188603921 has 4 divisors (see below), whose sum is σ = 65584805232. Its totient is φ = 32792402612.

The previous prime is 49188603907. The next prime is 49188603923. The reversal of 49188603921 is 12930688194.

49188603921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 49188603921 - 2¹⁴ = 49188587537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (49188603923) 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, 8198100651 + ... + 8198100656.

It is an arithmetic number, because the mean of its divisors is an integer number (16396201308).

Almost surely, 2^49188603921 is an apocalyptic number.

It is an amenable number.

49188603921 is a deficient number, since it is larger than the sum of its proper divisors (16396201311).

49188603921 is a wasteful number, since it uses less digits than its factorization.

49188603921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16396201310.

The product of its (nonzero) digits is 746496, while the sum is 51.

The spelling of 49188603921 in words is "forty-nine billion, one hundred eighty-eight million, six hundred three thousand, nine hundred twenty-one".