61278471 has 16 divisors (see below), whose sum is σ = 90956800. Its totient is φ = 40774104.

The previous prime is 61278461. The next prime is 61278473. The reversal of 61278471 is 17487216.

It is not a de Polignac number, because 61278471 - 2⁶ = 61278407 is a prime.

It is a super-3 number, since 3×61278471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61278473) 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, 14520 + ... + 18258.

It is an arithmetic number, because the mean of its divisors is an integer number (5684800).

Almost surely, 2^61278471 is an apocalyptic number.

61278471 is a deficient number, since it is larger than the sum of its proper divisors (29678329).

61278471 is a wasteful number, since it uses less digits than its factorization.

61278471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4355 (or 4349 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 61278471 is about 7828.0566553903. The cubic root of 61278471 is about 394.2478256530.

The spelling of 61278471 in words is "sixty-one million, two hundred seventy-eight thousand, four hundred seventy-one".