77543740986 has 16 divisors (see below), whose sum is σ = 157271813568. Its totient is φ = 25483858400.

The previous prime is 77543740973. The next prime is 77543740997. The reversal of 77543740986 is 68904734577.

It is a super-2 number, since 2×77543740986² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91013355 + ... + 91014206.

It is an arithmetic number, because the mean of its divisors is an integer number (9829488348).

Almost surely, 2^77543740986 is an apocalyptic number.

77543740986 is an abundant number, since it is smaller than the sum of its proper divisors (79728072582).

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

77543740986 is a wasteful number, since it uses less digits than its factorization.

77543740986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182027637.

The product of its (nonzero) digits is 35562240, while the sum is 60.

The spelling of 77543740986 in words is "seventy-seven billion, five hundred forty-three million, seven hundred forty thousand, nine hundred eighty-six".