77072045 has 8 divisors (see below), whose sum is σ = 95470080. Its totient is φ = 59668560.

The previous prime is 77071957. The next prime is 77072059. The reversal of 77072045 is 54027077.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77072045 - 2²² = 72877741 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248465 + ... + 248774.

It is an arithmetic number, because the mean of its divisors is an integer number (11933760).

Almost surely, 2^77072045 is an apocalyptic number.

It is an amenable number.

77072045 is a deficient number, since it is larger than the sum of its proper divisors (18398035).

77072045 is a wasteful number, since it uses less digits than its factorization.

77072045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497275.

The product of its (nonzero) digits is 13720, while the sum is 32.

The square root of 77072045 is about 8779.0685724626. The cubic root of 77072045 is about 425.5647302359.

The spelling of 77072045 in words is "seventy-seven million, seventy-two thousand, forty-five".