1964696626840 has 16 divisors (see below), whose sum is σ = 4420567410480. Its totient is φ = 785878650720.

The previous prime is 1964696626807. The next prime is 1964696626853. The reversal of 1964696626840 is 486266964691.

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 3 ways as a sum of consecutive naturals, for example, 24558707796 + ... + 24558707875.

It is an arithmetic number, because the mean of its divisors is an integer number (276285463155).

Almost surely, 2^{1964696626840} is an apocalyptic number.

1964696626840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1964696626840 is an abundant number, since it is smaller than the sum of its proper divisors (2455870783640).

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

1964696626840 is a wasteful number, since it uses less digits than its factorization.

1964696626840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49117415682 (or 49117415678 counting only the distinct ones).

The product of its (nonzero) digits is 161243136, while the sum is 67.

The spelling of 1964696626840 in words is "one trillion, nine hundred sixty-four billion, six hundred ninety-six million, six hundred twenty-six thousand, eight hundred forty".