1662891059520 has 896 divisors, whose sum is σ = 6276441600000. Its totient is φ = 413266157568.

The previous prime is 1662891059513. The next prime is 1662891059561. The reversal of 1662891059520 is 259501982661.

1662891059520 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 8 + 9 + 105 + 9 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3560794327 + ... + 3560794793.

Almost surely, 2^{1662891059520} is an apocalyptic number.

1662891059520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662891059520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3138220800000).

1662891059520 is an abundant number, since it is smaller than the sum of its proper divisors (4613550540480).

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

1662891059520 is a wasteful number, since it uses less digits than its factorization.

1662891059520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 804 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 1662891059520 in words is "one trillion, six hundred sixty-two billion, eight hundred ninety-one million, fifty-nine thousand, five hundred twenty".