61406631 has 24 divisors (see below), whose sum is σ = 104207376. Its totient is φ = 34352640.

The previous prime is 61406627. The next prime is 61406677. The reversal of 61406631 is 13660416.

It is not a de Polignac number, because 61406631 - 2² = 61406627 is a prime.

It is a super-2 number, since 2×61406631² = 7541548661540322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61406595 and 61406604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61406831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22570 + ... + 25143.

It is an arithmetic number, because the mean of its divisors is an integer number (4341974).

Almost surely, 2^61406631 is an apocalyptic number.

61406631 is a deficient number, since it is larger than the sum of its proper divisors (42800745).

61406631 is a wasteful number, since it uses less digits than its factorization.

61406631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47743 (or 47740 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 61406631 is about 7836.2383195000. The cubic root of 61406631 is about 394.5224822976.

The spelling of 61406631 in words is "sixty-one million, four hundred six thousand, six hundred thirty-one".