1980401423715 has 144 divisors (see below), whose sum is σ = 4302393417504. Its totient is φ = 834195732480.

The previous prime is 1980401423669. The next prime is 1980401423719. The reversal of 1980401423715 is 5173241040891.

1980401423715 is a `hidden beast` number, since 1 + 9 + 8 + 0 + 401 + 4 + 237 + 1 + 5 = 666.

It is not a de Polignac number, because 1980401423715 - 2¹⁴ = 1980401407331 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1980401423719) 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, 380472 + ... + 2026218.

It is an arithmetic number, because the mean of its divisors is an integer number (29877732066).

Almost surely, 2^{1980401423715} is an apocalyptic number.

1980401423715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1980401423715 is an abundant number, since it is smaller than the sum of its proper divisors (2321991993789).

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

1980401423715 is a wasteful number, since it uses less digits than its factorization.

1980401423715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645810 (or 1645796 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 1980401423715 in words is "one trillion, nine hundred eighty billion, four hundred one million, four hundred twenty-three thousand, seven hundred fifteen".