977640620042 has 8 divisors (see below), whose sum is σ = 1467802617636. Its totient is φ = 488373080832.

The previous prime is 977640620027. The next prime is 977640620081. The reversal of 977640620042 is 240026046779.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 886514519401 + 91126100641 = 941549^2 + 301871^2 .

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

It is a super-2 number, since 2×977640620042² (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 3 ways as a sum of consecutive naturals, for example, 223611863 + ... + 223616234.

Almost surely, 2^977640620042 is an apocalyptic number.

977640620042 is a deficient number, since it is larger than the sum of its proper divisors (490161997594).

977640620042 is a wasteful number, since it uses less digits than its factorization.

977640620042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447229192.

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 977640620042 in words is "nine hundred seventy-seven billion, six hundred forty million, six hundred twenty thousand, forty-two".