49321978541 has 4 divisors (see below), whose sum is σ = 53805794784. Its totient is φ = 44838162300.

The previous prime is 49321978507. The next prime is 49321978561. The reversal of 49321978541 is 14587912394.

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 49321978541 - 2⁶ = 49321978477 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 (49321978561) 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, 2241908105 + ... + 2241908126.

It is an arithmetic number, because the mean of its divisors is an integer number (13451448696).

Almost surely, 2^49321978541 is an apocalyptic number.

It is an amenable number.

49321978541 is a deficient number, since it is larger than the sum of its proper divisors (4483816243).

49321978541 is a wasteful number, since it uses less digits than its factorization.

49321978541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4483816242.

The product of its digits is 2177280, while the sum is 53.

The spelling of 49321978541 in words is "forty-nine billion, three hundred twenty-one million, nine hundred seventy-eight thousand, five hundred forty-one".