61401005247 has 16 divisors (see below), whose sum is σ = 84705315840. Its totient is φ = 39515824992.

The previous prime is 61401005231. The next prime is 61401005287. The reversal of 61401005247 is 74250010416.

It is not a de Polignac number, because 61401005247 - 2⁴ = 61401005231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61401005227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488538 + ... + 601224.

It is an arithmetic number, because the mean of its divisors is an integer number (5294082240).

Almost surely, 2^61401005247 is an apocalyptic number.

61401005247 is a deficient number, since it is larger than the sum of its proper divisors (23304310593).

61401005247 is a wasteful number, since it uses less digits than its factorization.

61401005247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118982.

The product of its (nonzero) digits is 6720, while the sum is 30.

The spelling of 61401005247 in words is "sixty-one billion, four hundred one million, five thousand, two hundred forty-seven".