1620694394522 has 32 divisors (see below), whose sum is σ = 2815396945920. Its totient is φ = 685329231600.

The previous prime is 1620694394489. The next prime is 1620694394531. The reversal of 1620694394522 is 2254934960261.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 1151897 + ... + 2137347.

It is an arithmetic number, because the mean of its divisors is an integer number (87981154560).

Almost surely, 2^{1620694394522} is an apocalyptic number.

1620694394522 is a deficient number, since it is larger than the sum of its proper divisors (1194702551398).

1620694394522 is a wasteful number, since it uses less digits than its factorization.

1620694394522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987026.

The product of its (nonzero) digits is 5598720, while the sum is 53.

The spelling of 1620694394522 in words is "one trillion, six hundred twenty billion, six hundred ninety-four million, three hundred ninety-four thousand, five hundred twenty-two".