78136465 has 16 divisors (see below), whose sum is σ = 102787776. Its totient is φ = 56548800.

The previous prime is 78136463. The next prime is 78136477. The reversal of 78136465 is 56463187.

It is a happy number.

It is not a de Polignac number, because 78136465 - 2¹ = 78136463 is a prime.

It is a super-2 number, since 2×78136465² = 12210614325392450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78136463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8239 + ... + 14971.

It is an arithmetic number, because the mean of its divisors is an integer number (6424236).

Almost surely, 2^78136465 is an apocalyptic number.

It is an amenable number.

78136465 is a deficient number, since it is larger than the sum of its proper divisors (24651311).

78136465 is a wasteful number, since it uses less digits than its factorization.

78136465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6960.

The product of its digits is 120960, while the sum is 40.

The square root of 78136465 is about 8839.4832993790. The cubic root of 78136465 is about 427.5148975121.

The spelling of 78136465 in words is "seventy-eight million, one hundred thirty-six thousand, four hundred sixty-five".