61478631 has 6 divisors (see below), whose sum is σ = 88802480. Its totient is φ = 40985748.

The previous prime is 61478621. The next prime is 61478633. The reversal of 61478631 is 13687416.

61478631 is a `hidden beast` number, since 6 + 14 + 7 + 8 + 631 = 666.

It is not a de Polignac number, because 61478631 - 2⁶ = 61478567 is a prime.

It is a super-2 number, since 2×61478631² = 7559244139268322, which contains 22 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 (61478633) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3415471 + ... + 3415488.

Almost surely, 2^61478631 is an apocalyptic number.

61478631 is a deficient number, since it is larger than the sum of its proper divisors (27323849).

61478631 is a wasteful number, since it uses less digits than its factorization.

61478631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6830965 (or 6830962 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 61478631 is about 7840.8310146310. The cubic root of 61478631 is about 394.6766161618.

The spelling of 61478631 in words is "sixty-one million, four hundred seventy-eight thousand, six hundred thirty-one".