537721957780 has 96 divisors (see below), whose sum is σ = 1309009443840. Its totient is φ = 181738252800.

The previous prime is 537721957777. The next prime is 537721957781. The reversal of 537721957780 is 87759127735.

It is a super-2 number, since 2×537721957780² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537721957781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3155029 + ... + 3321091.

It is an arithmetic number, because the mean of its divisors is an integer number (13635515040).

Almost surely, 2^537721957780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 537721957780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (654504721920).

537721957780 is an abundant number, since it is smaller than the sum of its proper divisors (771287486060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

537721957780 is a wasteful number, since it uses less digits than its factorization.

537721957780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166409 (or 166407 counting only the distinct ones).

The product of its (nonzero) digits is 25930800, while the sum is 61.

The spelling of 537721957780 in words is "five hundred thirty-seven billion, seven hundred twenty-one million, nine hundred fifty-seven thousand, seven hundred eighty".