1620843193970 has 288 divisors, whose sum is σ = 4117523927616. Its totient is φ = 453723379200.

The previous prime is 1620843193897. The next prime is 1620843193973. The reversal of 1620843193970 is 793913480261.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1620843193973) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 33679625 + ... + 33727715.

It is an arithmetic number, because the mean of its divisors is an integer number (14296958082).

Almost surely, 2^{1620843193970} is an apocalyptic number.

1620843193970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1620843193970 is an abundant number, since it is smaller than the sum of its proper divisors (2496680733646).

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

1620843193970 is a wasteful number, since it uses less digits than its factorization.

1620843193970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48186 (or 48166 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 1620843193970 in words is "one trillion, six hundred twenty billion, eight hundred forty-three million, one hundred ninety-three thousand, nine hundred seventy".