1645954788146 has 16 divisors (see below), whose sum is σ = 2478369908160. Its totient is φ = 819832126800.

The previous prime is 1645954788139. The next prime is 1645954788187. The reversal of 1645954788146 is 6418874595461.

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, 5144555 + ... + 5455121.

It is an arithmetic number, because the mean of its divisors is an integer number (154898119260).

Almost surely, 2^{1645954788146} is an apocalyptic number.

1645954788146 is a deficient number, since it is larger than the sum of its proper divisors (832415120014).

1645954788146 is a wasteful number, since it uses less digits than its factorization.

1645954788146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320689.

The product of its digits is 232243200, while the sum is 68.

The spelling of 1645954788146 in words is "one trillion, six hundred forty-five billion, nine hundred fifty-four million, seven hundred eighty-eight thousand, one hundred forty-six".