1965094947648 has 84 divisors (see below), whose sum is σ = 6437245565920. Its totient is φ = 561455698176.

The previous prime is 1965094947643. The next prime is 1965094947661. The reversal of 1965094947648 is 8467494905691.

1965094947648 is a `hidden beast` number, since 1 + 9 + 6 + 509 + 4 + 9 + 4 + 76 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965094947643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243683338 + ... + 243691401.

Almost surely, 2^{1965094947648} is an apocalyptic number.

1965094947648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1965094947648 is an abundant number, since it is smaller than the sum of its proper divisors (4472150618272).

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

1965094947648 is a wasteful number, since it uses less digits than its factorization.

1965094947648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487374764 (or 487374751 counting only the distinct ones).

The product of its (nonzero) digits is 470292480, while the sum is 72.

The spelling of 1965094947648 in words is "one trillion, nine hundred sixty-five billion, ninety-four million, nine hundred forty-seven thousand, six hundred forty-eight".