61486401 has 4 divisors (see below), whose sum is σ = 81981872. Its totient is φ = 40990932.

The previous prime is 61486393. The next prime is 61486421. The reversal of 61486401 is 10468416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61486401 - 2³ = 61486393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61486421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10247731 + ... + 10247736.

It is an arithmetic number, because the mean of its divisors is an integer number (20495468).

Almost surely, 2^61486401 is an apocalyptic number.

It is an amenable number.

61486401 is a deficient number, since it is larger than the sum of its proper divisors (20495471).

61486401 is a wasteful number, since it uses less digits than its factorization.

61486401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20495470.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 61486401 is about 7841.3264821712. The cubic root of 61486401 is about 394.6932425791.

The spelling of 61486401 in words is "sixty-one million, four hundred eighty-six thousand, four hundred one".