61996401 has 8 divisors (see below), whose sum is σ = 91846560. Its totient is φ = 41330916.

The previous prime is 61996397. The next prime is 61996409. The reversal of 61996401 is 10469916.

61996401 is a `hidden beast` number, since 6 + 1 + 9 + 9 + 640 + 1 = 666.

It is not a de Polignac number, because 61996401 - 2² = 61996397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61996409) 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 7 ways as a sum of consecutive naturals, for example, 1148055 + ... + 1148108.

It is an arithmetic number, because the mean of its divisors is an integer number (11480820).

Almost surely, 2^61996401 is an apocalyptic number.

It is an amenable number.

61996401 is a deficient number, since it is larger than the sum of its proper divisors (29850159).

61996401 is a wasteful number, since it uses less digits than its factorization.

61996401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2296172 (or 2296166 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 61996401 is about 7873.7793339666. The cubic root of 61996401 is about 395.7815025124.

It can be divided in two parts, 619 and 96401, that added together give a triangular number (97020 = T₄₄₀).

The spelling of 61996401 in words is "sixty-one million, nine hundred ninety-six thousand, four hundred one".