61916401 has 4 divisors (see below), whose sum is σ = 62035312. Its totient is φ = 61797492.

The previous prime is 61916381. The next prime is 61916411. The reversal of 61916401 is 10461916.

61916401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 61916401 - 2⁵ = 61916369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61916401.

It is not an unprimeable number, because it can be changed into a prime (61916411) 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 3 ways as a sum of consecutive naturals, for example, 58671 + ... + 59716.

It is an arithmetic number, because the mean of its divisors is an integer number (15508828).

Almost surely, 2^61916401 is an apocalyptic number.

It is an amenable number.

61916401 is a deficient number, since it is larger than the sum of its proper divisors (118911).

61916401 is a wasteful number, since it uses less digits than its factorization.

61916401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118910.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 61916401 is about 7868.6975415249. The cubic root of 61916401 is about 395.6111907494.

It can be divided in two parts, 619 and 16401, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 61916401 in words is "sixty-one million, nine hundred sixteen thousand, four hundred one".