1645074505908 has 48 divisors (see below), whose sum is σ = 4489482088000. Its totient is φ = 519497211744.

The previous prime is 1645074505897. The next prime is 1645074505931. The reversal of 1645074505908 is 8095054705461.

It is a happy number.

1645074505908 is a `hidden beast` number, since 1 + 6 + 4 + 5 + 0 + 7 + 45 + 0 + 590 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400844563 + ... + 400848666.

Almost surely, 2^{1645074505908} is an apocalyptic number.

1645074505908 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1645074505908 is an abundant number, since it is smaller than the sum of its proper divisors (2844407582092).

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

1645074505908 is a wasteful number, since it uses less digits than its factorization.

1645074505908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801693261 (or 801693253 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 1645074505908 in words is "one trillion, six hundred forty-five billion, seventy-four million, five hundred five thousand, nine hundred eight".