61575552001 has 4 divisors (see below), whose sum is σ = 61585901572. Its totient is φ = 61565202432.

The previous prime is 61575551987. The next prime is 61575552007. The reversal of 61575552001 is 10025557516.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33014890000 + 28560662001 = 181700^2 + 168999^2 .

It is a cyclic number.

It is not a de Polignac number, because 61575552001 - 2²⁹ = 61038681089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61575552007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5165856 + ... + 5177761.

It is an arithmetic number, because the mean of its divisors is an integer number (15396475393).

Almost surely, 2^61575552001 is an apocalyptic number.

It is an amenable number.

61575552001 is a deficient number, since it is larger than the sum of its proper divisors (10349571).

61575552001 is a wasteful number, since it uses less digits than its factorization.

61575552001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10349570.

The product of its (nonzero) digits is 52500, while the sum is 37.

The spelling of 61575552001 in words is "sixty-one billion, five hundred seventy-five million, five hundred fifty-two thousand, one".