61575880407 has 16 divisors (see below), whose sum is σ = 82551479808. Its totient is φ = 40825995840.

The previous prime is 61575880367. The next prime is 61575880411. The reversal of 61575880407 is 70408857516.

It is a happy number.

It is not a de Polignac number, because 61575880407 - 2⁷ = 61575880279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61575880407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61575880477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371058 + ... + 510720.

It is an arithmetic number, because the mean of its divisors is an integer number (5159467488).

Almost surely, 2^61575880407 is an apocalyptic number.

61575880407 is a deficient number, since it is larger than the sum of its proper divisors (20975599401).

61575880407 is a wasteful number, since it uses less digits than its factorization.

61575880407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140470.

The product of its (nonzero) digits is 1881600, while the sum is 51.

The spelling of 61575880407 in words is "sixty-one billion, five hundred seventy-five million, eight hundred eighty thousand, four hundred seven".