1645237401006 has 16 divisors (see below), whose sum is σ = 3396619150848. Its totient is φ = 530721742200.

The previous prime is 1645237400993. The next prime is 1645237401013. The reversal of 1645237401006 is 6001047325461.

It is a happy number.

It is a super-2 number, since 2×1645237401006² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4422681000 + ... + 4422681371.

It is an arithmetic number, because the mean of its divisors is an integer number (212288696928).

Almost surely, 2^{1645237401006} is an apocalyptic number.

1645237401006 is an abundant number, since it is smaller than the sum of its proper divisors (1751381749842).

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

1645237401006 is a wasteful number, since it uses less digits than its factorization.

1645237401006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8845362407.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 1645237401006 in words is "one trillion, six hundred forty-five billion, two hundred thirty-seven million, four hundred one thousand, six".