77101540 has 24 divisors (see below), whose sum is σ = 163006200. Its totient is φ = 30632448.

The previous prime is 77101489. The next prime is 77101547. The reversal of 77101540 is 4510177.

It can be written as a sum of positive squares in 4 ways, for example, as 678976 + 76422564 = 824^2 + 8742^2 .

It is not an unprimeable number, because it can be changed into a prime (77101547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9957 + ... + 15916.

It is an arithmetic number, because the mean of its divisors is an integer number (6791925).

Almost surely, 2^77101540 is an apocalyptic number.

It is an amenable number.

77101540 is an abundant number, since it is smaller than the sum of its proper divisors (85904660).

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

77101540 is a wasteful number, since it uses less digits than its factorization.

77101540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26031 (or 26029 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 77101540 is about 8780.7482596872. The cubic root of 77101540 is about 425.6190103183.

The spelling of 77101540 in words is "seventy-seven million, one hundred one thousand, five hundred forty".