77148145 has 8 divisors (see below), whose sum is σ = 95080104. Its totient is φ = 60050304.

The previous prime is 77148131. The next prime is 77148167. The reversal of 77148145 is 54184177.

It can be written as a sum of positive squares in 4 ways, for example, as 28483569 + 48664576 = 5337^2 + 6976^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 77148145 - 2²¹ = 75050993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

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, 208324 + ... + 208693.

It is an arithmetic number, because the mean of its divisors is an integer number (11885013).

Almost surely, 2^77148145 is an apocalyptic number.

It is an amenable number.

77148145 is a deficient number, since it is larger than the sum of its proper divisors (17931959).

77148145 is a wasteful number, since it uses less digits than its factorization.

77148145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417059.

The product of its digits is 31360, while the sum is 37.

The square root of 77148145 is about 8783.4016758884. The cubic root of 77148145 is about 425.7047499746.

The spelling of 77148145 in words is "seventy-seven million, one hundred forty-eight thousand, one hundred forty-five".