1977046154906 has 8 divisors (see below), whose sum is σ = 2966045954004. Its totient is φ = 988364170240.

The previous prime is 1977046154887. The next prime is 1977046154969. The reversal of 1977046154906 is 6094516407791.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1700063938225 + 276982216681 = 1303865^2 + 526291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1977046154906² (a number of 25 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 79438055 + ... + 79462938.

Almost surely, 2^{1977046154906} is an apocalyptic number.

1977046154906 is a deficient number, since it is larger than the sum of its proper divisors (988999799098).

1977046154906 is a wasteful number, since it uses less digits than its factorization.

1977046154906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158907216.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 1977046154906 in words is "one trillion, nine hundred seventy-seven billion, forty-six million, one hundred fifty-four thousand, nine hundred six".