61520191200001 has 4 divisors (see below), whose sum is σ = 61520209293312. Its totient is φ = 61520173106692.

The previous prime is 61520191199993. The next prime is 61520191200011. The reversal of 61520191200001 is 10000219102516.

61520191200001 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 61520191200001 - 2³ = 61520191199993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61520191200011) 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 3 ways as a sum of consecutive naturals, for example, 2238625 + ... + 11315998.

It is an arithmetic number, because the mean of its divisors is an integer number (15380052323328).

Almost surely, 2^{61520191200001} is an apocalyptic number.

It is an amenable number.

61520191200001 is a deficient number, since it is larger than the sum of its proper divisors (18093311).

61520191200001 is a wasteful number, since it uses less digits than its factorization.

61520191200001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18093310.

The product of its (nonzero) digits is 1080, while the sum is 28.

The spelling of 61520191200001 in words is "sixty-one trillion, five hundred twenty billion, one hundred ninety-one million, two hundred thousand, one".