2061640456 has 48 divisors (see below), whose sum is σ = 4116870000. Its totient is φ = 967697664.

The previous prime is 2061640447. The next prime is 2061640487. The reversal of 2061640456 is 6540461602.

It is a super-2 number, since 2×2061640456² = 8500722739631775872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1152795 + ... + 1154581.

It is an arithmetic number, because the mean of its divisors is an integer number (85768125).

Almost surely, 2^2061640456 is an apocalyptic number.

It is an amenable number.

2061640456 is a deficient number, since it is larger than the sum of its proper divisors (2055229544).

2061640456 is a wasteful number, since it uses less digits than its factorization.

2061640456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326 (or 2305 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 2061640456 is about 45405.2910573206. The cubic root of 2061640456 is about 1272.7339899052.

It can be divided in two parts, 2061640 and 456, that added together give a square (2062096 = 1436²).

The spelling of 2061640456 in words is "two billion, sixty-one million, six hundred forty thousand, four hundred fifty-six".