1020174781451 has 12 divisors (see below), whose sum is σ = 1186939611720. Its totient is φ = 874283971680.

The previous prime is 1020174781433. The next prime is 1020174781453. The reversal of 1020174781451 is 1541874710201.

It is not a de Polignac number, because 1020174781451 - 2³⁴ = 1002994912267 is a prime.

It is a super-2 number, since 2×1020174781451² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020174781399 and 1020174781408.

It is not an unprimeable number, because it can be changed into a prime (1020174781453) 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, 1518170 + ... + 2084511.

It is an arithmetic number, because the mean of its divisors is an integer number (98911634310).

Almost surely, 2^{1020174781451} is an apocalyptic number.

1020174781451 is a deficient number, since it is larger than the sum of its proper divisors (166764830269).

1020174781451 is an equidigital number, since it uses as much as digits as its factorization.

1020174781451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3608474 (or 3608467 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 41.

The spelling of 1020174781451 in words is "one trillion, twenty billion, one hundred seventy-four million, seven hundred eighty-one thousand, four hundred fifty-one".