2451212334640 has 20 divisors (see below), whose sum is σ = 5699068678224. Its totient is φ = 980484933824.

The previous prime is 2451212334601. The next prime is 2451212334689. The reversal of 2451212334640 is 464332121542.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 2451212334640.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15320077012 + ... + 15320077171.

Almost surely, 2^{2451212334640} is an apocalyptic number.

2451212334640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2451212334640 is an abundant number, since it is smaller than the sum of its proper divisors (3247856343584).

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

2451212334640 is a wasteful number, since it uses less digits than its factorization.

2451212334640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30640154196 (or 30640154190 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 2451212334640 in words is "two trillion, four hundred fifty-one billion, two hundred twelve million, three hundred thirty-four thousand, six hundred forty".