245451021402 has 16 divisors (see below), whose sum is σ = 490914112032. Its totient is φ = 81814995600.

The previous prime is 245451021269. The next prime is 245451021419. The reversal of 245451021402 is 204120154542.

It is a self number, because there is not a number n which added to its sum of digits gives 245451021402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226849 + ... + 736452.

It is an arithmetic number, because the mean of its divisors is an integer number (30682132002).

Almost surely, 2^245451021402 is an apocalyptic number.

245451021402 is an abundant number, since it is smaller than the sum of its proper divisors (245463090630).

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

245451021402 is a wasteful number, since it uses less digits than its factorization.

245451021402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005773.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 245451021402 its reverse (204120154542), we get a palindrome (449571175944).

The spelling of 245451021402 in words is "two hundred forty-five billion, four hundred fifty-one million, twenty-one thousand, four hundred two".