78461651 has 12 divisors (see below), whose sum is σ = 82140480. Its totient is φ = 74868480.

The previous prime is 78461639. The next prime is 78461683. The reversal of 78461651 is 15616487.

It is not a de Polignac number, because 78461651 - 2¹⁴ = 78445267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78461611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 291545 + ... + 291813.

It is an arithmetic number, because the mean of its divisors is an integer number (6845040).

Almost surely, 2^78461651 is an apocalyptic number.

78461651 is a deficient number, since it is larger than the sum of its proper divisors (3678829).

78461651 is an equidigital number, since it uses as much as digits as its factorization.

78461651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 397 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 78461651 is about 8857.8581496883. The cubic root of 78461651 is about 428.1071495639.

The spelling of 78461651 in words is "seventy-eight million, four hundred sixty-one thousand, six hundred fifty-one".