71461978 has 16 divisors (see below), whose sum is σ = 124058880. Its totient is φ = 30238416.

The previous prime is 71461939. The next prime is 71461979. The reversal of 71461978 is 87916417.

It is not an unprimeable number, because it can be changed into a prime (71461979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31201 + ... + 33412.

It is an arithmetic number, because the mean of its divisors is an integer number (7753680).

Almost surely, 2^71461978 is an apocalyptic number.

71461978 is a deficient number, since it is larger than the sum of its proper divisors (52596902).

71461978 is a wasteful number, since it uses less digits than its factorization.

71461978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64701.

The product of its digits is 84672, while the sum is 43.

The square root of 71461978 is about 8453.5186756758. The cubic root of 71461978 is about 414.9779404735.

The spelling of 71461978 in words is "seventy-one million, four hundred sixty-one thousand, nine hundred seventy-eight".