2061656560 has 60 divisors (see below), whose sum is σ = 5058982008. Its totient is φ = 781248384.

The previous prime is 2061656537. The next prime is 2061656567. The reversal of 2061656560 is 656561602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061656567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6814 + ... + 64573.

Almost surely, 2^2061656560 is an apocalyptic number.

2061656560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2061656560 is an abundant number, since it is smaller than the sum of its proper divisors (2997325448).

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

2061656560 is a wasteful number, since it uses less digits than its factorization.

2061656560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71438 (or 71413 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 2061656560 is about 45405.4683931352. The cubic root of 2061656560 is about 1272.7373037799.

The spelling of 2061656560 in words is "two billion, sixty-one million, six hundred fifty-six thousand, five hundred sixty".