78461051 has 4 divisors (see below), whose sum is σ = 82590600. Its totient is φ = 74331504.

The previous prime is 78461039. The next prime is 78461077. The reversal of 78461051 is 15016487.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78461051 - 2¹⁰ = 78460027 is a prime.

It is a super-2 number, since 2×78461051² = 12312273048049202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78460999 and 78461017.

It is not an unprimeable number, because it can be changed into a prime (78461011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2064746 + ... + 2064783.

It is an arithmetic number, because the mean of its divisors is an integer number (20647650).

Almost surely, 2^78461051 is an apocalyptic number.

78461051 is a deficient number, since it is larger than the sum of its proper divisors (4129549).

78461051 is a wasteful number, since it uses less digits than its factorization.

78461051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129548.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 78461051 is about 8857.8242813910. The cubic root of 78461051 is about 428.1060583091.

The spelling of 78461051 in words is "seventy-eight million, four hundred sixty-one thousand, fifty-one".