1061992451520 has 2520 divisors, whose sum is σ = 5195727272736. Its totient is φ = 200359526400.

The previous prime is 1061992451497. The next prime is 1061992451549. The reversal of 1061992451520 is 251542991601.

1061992451520 is a `hidden beast` number, since 1 + 0 + 6 + 1 + 99 + 24 + 515 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (2520).

It is a super-2 number, since 2×1061992451520² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 17409712290 + ... + 17409712350.

Almost surely, 2^{1061992451520} is an apocalyptic number.

1061992451520 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 1061992451520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2597863636368).

1061992451520 is an abundant number, since it is smaller than the sum of its proper divisors (4133734821216).

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

1061992451520 is a wasteful number, since it uses less digits than its factorization.

1061992451520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 1061992451520 in words is "one trillion, sixty-one billion, nine hundred ninety-two million, four hundred fifty-one thousand, five hundred twenty".