1977401130120 has 96 divisors (see below), whose sum is σ = 6920903971800. Its totient is φ = 486744892416.

The previous prime is 1977401130077. The next prime is 1977401130139. The reversal of 1977401130120 is 210311047791.

It can be written as a sum of positive squares in 4 ways, for example, as 1554794523396 + 422606606724 = 1246914^2 + 650082^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 211256125 + ... + 211265484.

Almost surely, 2^{1977401130120} is an apocalyptic number.

1977401130120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1977401130120 is an abundant number, since it is smaller than the sum of its proper divisors (4943502841680).

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

1977401130120 is a wasteful number, since it uses less digits than its factorization.

1977401130120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422521639 (or 422521632 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The spelling of 1977401130120 in words is "one trillion, nine hundred seventy-seven billion, four hundred one million, one hundred thirty thousand, one hundred twenty".