77240679061 has 12 divisors (see below), whose sum is σ = 96763049292. Its totient is φ = 61113503808.

The previous prime is 77240679029. The next prime is 77240679067. The reversal of 77240679061 is 16097604277.

It can be written as a sum of positive squares in 2 ways, for example, as 41374000836 + 35866678225 = 203406^2 + 189385^2 .

It is not a de Polignac number, because 77240679061 - 2⁵ = 77240679029 is a prime.

It is a super-2 number, since 2×77240679061² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 77240678996 and 77240679014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77240679067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60627840 + ... + 60629113.

It is an arithmetic number, because the mean of its divisors is an integer number (8063587441).

Almost surely, 2^77240679061 is an apocalyptic number.

It is an amenable number.

77240679061 is a deficient number, since it is larger than the sum of its proper divisors (19522370231).

77240679061 is a wasteful number, since it uses less digits than its factorization.

77240679061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121256980 (or 121256973 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 49.

The spelling of 77240679061 in words is "seventy-seven billion, two hundred forty million, six hundred seventy-nine thousand, sixty-one".