1969745646 has 16 divisors (see below), whose sum is σ = 4297627008. Its totient is φ = 596892600.

The previous prime is 1969745633. The next prime is 1969745669. The reversal of 1969745646 is 6465479691.

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, 14922250 + ... + 14922381.

It is an arithmetic number, because the mean of its divisors is an integer number (268601688).

Almost surely, 2^1969745646 is an apocalyptic number.

1969745646 is an abundant number, since it is smaller than the sum of its proper divisors (2327881362).

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

1969745646 is a wasteful number, since it uses less digits than its factorization.

1969745646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29844647.

The product of its digits is 9797760, while the sum is 57.

The square root of 1969745646 is about 44381.8166144650. The cubic root of 1969745646 is about 1253.5357272897.

The spelling of 1969745646 in words is "one billion, nine hundred sixty-nine million, seven hundred forty-five thousand, six hundred forty-six".