977408817409 has 8 divisors (see below), whose sum is σ = 1001351169000. Its totient is φ = 953471376000.

The previous prime is 977408817391. The next prime is 977408817431. The reversal of 977408817409 is 904718804779.

It can be written as a sum of positive squares in 4 ways, for example, as 30494938384 + 946913879025 = 174628^2 + 973095^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 977408817409 - 2³⁷ = 839969863937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (977408817449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822942 + ... + 1622359.

It is an arithmetic number, because the mean of its divisors is an integer number (125168896125).

Almost surely, 2^977408817409 is an apocalyptic number.

It is an amenable number.

977408817409 is a deficient number, since it is larger than the sum of its proper divisors (23942351591).

977408817409 is a wasteful number, since it uses less digits than its factorization.

977408817409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455091.

The product of its (nonzero) digits is 28449792, while the sum is 64.

The spelling of 977408817409 in words is "nine hundred seventy-seven billion, four hundred eight million, eight hundred seventeen thousand, four hundred nine".