2061854640 has 120 divisors (see below), whose sum is σ = 7147840128. Its totient is φ = 532085760.

The previous prime is 2061854623. The next prime is 2061854647. The reversal of 2061854640 is 464581602.

2061854640 is a `hidden beast` number, since 2 + 0 + 6 + 1 + 8 + 5 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2061854595 and 2061854604.

It is not an unprimeable number, because it can be changed into a prime (2061854647) 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, 23869 + ... + 68508.

Almost surely, 2^2061854640 is an apocalyptic number.

2061854640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2061854640 is an abundant number, since it is smaller than the sum of its proper divisors (5085985488).

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

2061854640 is a wasteful number, since it uses less digits than its factorization.

2061854640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92427 (or 92418 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 2061854640 is about 45407.6495758149. The cubic root of 2061854640 is about 1272.7780631926.

The spelling of 2061854640 in words is "two billion, sixty-one million, eight hundred fifty-four thousand, six hundred forty".