977986335581 has 8 divisors (see below), whose sum is σ = 979786787424. Its totient is φ = 976186109520.

The previous prime is 977986335559. The next prime is 977986335587. The reversal of 977986335581 is 185533689779.

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 977986335581 - 2¹⁰ = 977986334557 is a prime.

It is a super-2 number, since 2×977986335581² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (977986335587) 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, 10378166 + ... + 10471976.

It is an arithmetic number, because the mean of its divisors is an integer number (122473348428).

Almost surely, 2^977986335581 is an apocalyptic number.

It is an amenable number.

977986335581 is a deficient number, since it is larger than the sum of its proper divisors (1800451843).

977986335581 is a wasteful number, since it uses less digits than its factorization.

977986335581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112891.

The product of its digits is 342921600, while the sum is 71.

The spelling of 977986335581 in words is "nine hundred seventy-seven billion, nine hundred eighty-six million, three hundred thirty-five thousand, five hundred eighty-one".