61642400220265 has 8 divisors (see below), whose sum is σ = 73970922833928. Its totient is φ = 49313891796480.

The previous prime is 61642400220251. The next prime is 61642400220311. The reversal of 61642400220265 is 56202200424616.

It can be written as a sum of positive squares in 4 ways, for example, as 13233938071104 + 48408462149161 = 3637848^2 + 6957619^2 .

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

It is not a de Polignac number, because 61642400220265 - 2⁴⁵ = 26458028131433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13180569 + ... + 17234041.

It is an arithmetic number, because the mean of its divisors is an integer number (9246365354241).

Almost surely, 2^{61642400220265} is an apocalyptic number.

It is an amenable number.

61642400220265 is a deficient number, since it is larger than the sum of its proper divisors (12328522613663).

61642400220265 is a wasteful number, since it uses less digits than its factorization.

61642400220265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7094939.

The product of its (nonzero) digits is 276480, while the sum is 40.

The spelling of 61642400220265 in words is "sixty-one trillion, six hundred forty-two billion, four hundred million, two hundred twenty thousand, two hundred sixty-five".