77272545 has 32 divisors (see below), whose sum is σ = 141748992. Its totient is φ = 35212032.

The previous prime is 77272541. The next prime is 77272549. The reversal of 77272545 is 54527277.

It is an interprime number because it is at equal distance from previous prime (77272541) and next prime (77272549).

It is not a de Polignac number, because 77272545 - 2² = 77272541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77272541) 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 31 ways as a sum of consecutive naturals, for example, 38179 + ... + 40151.

It is an arithmetic number, because the mean of its divisors is an integer number (4429656).

Almost surely, 2^77272545 is an apocalyptic number.

It is an amenable number.

77272545 is a deficient number, since it is larger than the sum of its proper divisors (64476447).

77272545 is a wasteful number, since it uses less digits than its factorization.

77272545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2361.

The product of its digits is 137200, while the sum is 39.

The square root of 77272545 is about 8790.4803623010. The cubic root of 77272545 is about 425.9334408565.

The spelling of 77272545 in words is "seventy-seven million, two hundred seventy-two thousand, five hundred forty-five".