1977182627812 has 72 divisors (see below), whose sum is σ = 4089052251648. Its totient is φ = 818964988800.

The previous prime is 1977182627807. The next prime is 1977182627831. The reversal of 1977182627812 is 2187262817791.

It is a super-2 number, since 2×1977182627812² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13068237 + ... + 13218667.

It is an arithmetic number, because the mean of its divisors is an integer number (56792392384).

Almost surely, 2^{1977182627812} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1977182627812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2044526125824).

1977182627812 is an abundant number, since it is smaller than the sum of its proper divisors (2111869623836).

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

1977182627812 is a wasteful number, since it uses less digits than its factorization.

1977182627812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150697 (or 150588 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 61.

The spelling of 1977182627812 in words is "one trillion, nine hundred seventy-seven billion, one hundred eighty-two million, six hundred twenty-seven thousand, eight hundred twelve".