78461601 has 4 divisors (see below), whose sum is σ = 104615472. Its totient is φ = 52307732.

The previous prime is 78461573. The next prime is 78461611. The reversal of 78461601 is 10616487.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 78461601 - 2⁷ = 78461473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78461611) 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 3 ways as a sum of consecutive naturals, for example, 13076931 + ... + 13076936.

It is an arithmetic number, because the mean of its divisors is an integer number (26153868).

Almost surely, 2^78461601 is an apocalyptic number.

It is an amenable number.

78461601 is a deficient number, since it is larger than the sum of its proper divisors (26153871).

78461601 is a wasteful number, since it uses less digits than its factorization.

78461601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26153870.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 78461601 is about 8857.8553273352. The cubic root of 78461601 is about 428.1070586262.

The spelling of 78461601 in words is "seventy-eight million, four hundred sixty-one thousand, six hundred one".