63540771074421 has 64 divisors (see below), whose sum is σ = 88889789214720. Its totient is φ = 40297067965440.

The previous prime is 63540771074377. The next prime is 63540771074441. The reversal of 63540771074421 is 12447017704536.

It is not a de Polignac number, because 63540771074421 - 2⁹ = 63540771073909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63540771074441) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33319753150 + ... + 33319755056.

It is an arithmetic number, because the mean of its divisors is an integer number (1388902956480).

Almost surely, 2^{63540771074421} is an apocalyptic number.

It is an amenable number.

63540771074421 is a deficient number, since it is larger than the sum of its proper divisors (25349018140299).

63540771074421 is a wasteful number, since it uses less digits than its factorization.

63540771074421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4946.

The product of its (nonzero) digits is 3951360, while the sum is 51.

Adding to 63540771074421 its reverse (12447017704536), we get a palindrome (75987788778957).

The spelling of 63540771074421 in words is "sixty-three trillion, five hundred forty billion, seven hundred seventy-one million, seventy-four thousand, four hundred twenty-one".