61896457 has 6 divisors (see below), whose sum is σ = 72002058. Its totient is φ = 53054064.

The previous prime is 61896431. The next prime is 61896529. The reversal of 61896457 is 75469816.

61896457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 35569296 + 26327161 = 5964^2 + 5131^2 .

It is not a de Polignac number, because 61896457 - 2¹¹ = 61894409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61896407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 631548 + ... + 631645.

It is an arithmetic number, because the mean of its divisors is an integer number (12000343).

Almost surely, 2^61896457 is an apocalyptic number.

It is an amenable number.

61896457 is a deficient number, since it is larger than the sum of its proper divisors (10105601).

61896457 is a wasteful number, since it uses less digits than its factorization.

61896457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1263207 (or 1263200 counting only the distinct ones).

The product of its digits is 362880, while the sum is 46.

The square root of 61896457 is about 7867.4301395055. The cubic root of 61896457 is about 395.5687091841.

The spelling of 61896457 in words is "sixty-one million, eight hundred ninety-six thousand, four hundred fifty-seven".