1871481356745 has 64 divisors (see below), whose sum is σ = 4020413128704. Its totient is φ = 717930904320.

The previous prime is 1871481356681. The next prime is 1871481356753. The reversal of 1871481356745 is 5476531841781.

It is a happy number.

It is not a de Polignac number, because 1871481356745 - 2⁶ = 1871481356681 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62305377 + ... + 62335406.

It is an arithmetic number, because the mean of its divisors is an integer number (62818955136).

Almost surely, 2^{1871481356745} is an apocalyptic number.

1871481356745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1871481356745 is an abundant number, since it is smaller than the sum of its proper divisors (2148931771959).

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

1871481356745 is a wasteful number, since it uses less digits than its factorization.

1871481356745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124640822.

The product of its digits is 22579200, while the sum is 60.

The spelling of 1871481356745 in words is "one trillion, eight hundred seventy-one billion, four hundred eighty-one million, three hundred fifty-six thousand, seven hundred forty-five".