537721471730821 has 8 divisors (see below), whose sum is σ = 615350633064320. Its totient is φ = 460295262454608.

The previous prime is 537721471730809. The next prime is 537721471730903. The reversal of 537721471730821 is 128037174127735.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 537721471730821 - 2⁷ = 537721471730693 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 (537721471736821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50738008641 + ... + 50738019238.

It is an arithmetic number, because the mean of its divisors is an integer number (76918829133040).

Almost surely, 2^{537721471730821} is an apocalyptic number.

It is an amenable number.

537721471730821 is a deficient number, since it is larger than the sum of its proper divisors (77629161333499).

537721471730821 is a wasteful number, since it uses less digits than its factorization.

537721471730821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101476028643.

The product of its (nonzero) digits is 13829760, while the sum is 58.

The spelling of 537721471730821 in words is "five hundred thirty-seven trillion, seven hundred twenty-one billion, four hundred seventy-one million, seven hundred thirty thousand, eight hundred twenty-one".