2051450640 has 120 divisors (see below), whose sum is σ = 6897915648. Its totient is φ = 546382080.

The previous prime is 2051450629. The next prime is 2051450647. The reversal of 2051450640 is 460541502.

2051450640 is a `hidden beast` number, since 2 + 0 + 5 + 14 + 5 + 0 + 640 = 666.

2051450640 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (2051450647) 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, 928417 + ... + 930623.

Almost surely, 2^2051450640 is an apocalyptic number.

2051450640 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 2051450640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3448957824).

2051450640 is an abundant number, since it is smaller than the sum of its proper divisors (4846465008).

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

2051450640 is a wasteful number, since it uses less digits than its factorization.

2051450640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517 (or 3508 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 2051450640 is about 45292.9424965965. The cubic root of 2051450640 is about 1270.6336639833.

The spelling of 2051450640 in words is "two billion, fifty-one million, four hundred fifty thousand, six hundred forty".