1957537500 has 72 divisors (see below), whose sum is σ = 5709228336. Its totient is φ = 522000000.

The previous prime is 1957537499. The next prime is 1957537507. The reversal of 1957537500 is 57357591.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957537507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11400 + ... + 63600.

It is an arithmetic number, because the mean of its divisors is an integer number (79294838).

Almost surely, 2^1957537500 is an apocalyptic number.

1957537500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1957537500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2854614168).

1957537500 is an abundant number, since it is smaller than the sum of its proper divisors (3751690836).

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

1957537500 is an equidigital number, since it uses as much as digits as its factorization.

1957537500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52233 (or 52211 counting only the distinct ones).

The product of its (nonzero) digits is 165375, while the sum is 42.

The square root of 1957537500 is about 44244.0673989180. The cubic root of 1957537500 is about 1250.9406253350.

It can be divided in two parts, 19575 and 37500, that added together give a palindrome (57075).

The spelling of 1957537500 in words is "one billion, nine hundred fifty-seven million, five hundred thirty-seven thousand, five hundred".