61891464 has 32 divisors (see below), whose sum is σ = 156237120. Its totient is φ = 20429376.

The previous prime is 61891463. The next prime is 61891483. The reversal of 61891464 is 46419816.

It is not an unprimeable number, because it can be changed into a prime (61891463) 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, 10047 + ... + 14990.

It is an arithmetic number, because the mean of its divisors is an integer number (4882410).

Almost surely, 2^61891464 is an apocalyptic number.

It is an amenable number.

61891464 is an abundant number, since it is smaller than the sum of its proper divisors (94345656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61891464 is a wasteful number, since it uses less digits than its factorization.

61891464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25149 (or 25145 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 61891464 is about 7867.1128122075. The cubic root of 61891464 is about 395.5580724543.

The spelling of 61891464 in words is "sixty-one million, eight hundred ninety-one thousand, four hundred sixty-four".