57211009660 has 48 divisors (see below), whose sum is σ = 137351632320. Its totient is φ = 19608744960.

The previous prime is 57211009633. The next prime is 57211009663. The reversal of 57211009660 is 6690011275.

57211009660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×57211009660² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57211009663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 369540 + ... + 500980.

It is an arithmetic number, because the mean of its divisors is an integer number (2861492340).

Almost surely, 2^57211009660 is an apocalyptic number.

It is an amenable number.

57211009660 is an abundant number, since it is smaller than the sum of its proper divisors (80140622660).

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

57211009660 is a wasteful number, since it uses less digits than its factorization.

57211009660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134566 (or 134564 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The spelling of 57211009660 in words is "fifty-seven billion, two hundred eleven million, nine thousand, six hundred sixty".