245402220251240 has 64 divisors (see below), whose sum is σ = 594793041570000. Its totient is φ = 90584970964992.

The previous prime is 245402220251231. The next prime is 245402220251297. The reversal of 245402220251240 is 42152022204542.

It can be written as a sum of positive squares in 8 ways, for example, as 244726111204 + 245157494140036 = 494698^2 + 15657506^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 245402220251240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63430865 + ... + 67188384.

Almost surely, 2^{245402220251240} is an apocalyptic number.

245402220251240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245402220251240 is an abundant number, since it is smaller than the sum of its proper divisors (349390821318760).

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

245402220251240 is a wasteful number, since it uses less digits than its factorization.

245402220251240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130622886 (or 130622882 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 35.

Adding to 245402220251240 its reverse (42152022204542), we get a palindrome (287554242455782).

The spelling of 245402220251240 in words is "two hundred forty-five trillion, four hundred two billion, two hundred twenty million, two hundred fifty-one thousand, two hundred forty".