2061537400 has 192 divisors, whose sum is σ = 5374343520. Its totient is φ = 730521600.

The previous prime is 2061537389. The next prime is 2061537421. The reversal of 2061537400 is 47351602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8847684 + ... + 8847916.

Almost surely, 2^2061537400 is an apocalyptic number.

2061537400 is a gapful number since it is divisible by the number (20) 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 2061537400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2687171760).

2061537400 is an abundant number, since it is smaller than the sum of its proper divisors (3312806120).

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

2061537400 is a wasteful number, since it uses less digits than its factorization.

2061537400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 2061537400 is about 45404.1561974232. The cubic root of 2061537400 is about 1272.7127826736.

The spelling of 2061537400 in words is "two billion, sixty-one million, five hundred thirty-seven thousand, four hundred".