78454761 has 16 divisors (see below), whose sum is σ = 130418688. Its totient is φ = 40755600.

The previous prime is 78454757. The next prime is 78454777. The reversal of 78454761 is 16745487.

It is not a de Polignac number, because 78454761 - 2² = 78454757 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78452761) 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, 169585 + ... + 170046.

It is an arithmetic number, because the mean of its divisors is an integer number (8151168).

Almost surely, 2^78454761 is an apocalyptic number.

It is an amenable number.

78454761 is a deficient number, since it is larger than the sum of its proper divisors (51963927).

78454761 is a wasteful number, since it uses less digits than its factorization.

78454761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339652.

The product of its digits is 188160, while the sum is 42.

The square root of 78454761 is about 8857.4692209457. The cubic root of 78454761 is about 428.0946179871.

The spelling of 78454761 in words is "seventy-eight million, four hundred fifty-four thousand, seven hundred sixty-one".