61401747517261 has 8 divisors (see below), whose sum is σ = 61442684236800. Its totient is φ = 61360818192240.

The previous prime is 61401747517241. The next prime is 61401747517291. The reversal of 61401747517261 is 16271574710416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61401747517261 - 2²¹ = 61401745420109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61401747517199 and 61401747517208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61401747517241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14814300 + ... + 18500458.

It is an arithmetic number, because the mean of its divisors is an integer number (7680335529600).

Almost surely, 2^{61401747517261} is an apocalyptic number.

It is an amenable number.

61401747517261 is a deficient number, since it is larger than the sum of its proper divisors (40936719539).

61401747517261 is a wasteful number, since it uses less digits than its factorization.

61401747517261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3697259.

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 61401747517261 in words is "sixty-one trillion, four hundred one billion, seven hundred forty-seven million, five hundred seventeen thousand, two hundred sixty-one".