61607199429 has 20 divisors (see below), whose sum is σ = 93539212140. Its totient is φ = 40398160320.

The previous prime is 61607199397. The next prime is 61607199431. The reversal of 61607199429 is 92499170616.

It is a happy number.

61607199429 is a `hidden beast` number, since 6 + 1 + 60 + 71 + 99 + 429 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19092883329 + 42514316100 = 138177^2 + 206190^2 .

It is not a de Polignac number, because 61607199429 - 2⁵ = 61607199397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61607199449) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6229344 + ... + 6239225.

It is an arithmetic number, because the mean of its divisors is an integer number (4676960607).

Almost surely, 2^61607199429 is an apocalyptic number.

It is an amenable number.

61607199429 is a deficient number, since it is larger than the sum of its proper divisors (31932012711).

61607199429 is a wasteful number, since it uses less digits than its factorization.

61607199429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12468642 (or 12468633 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 61607199429 in words is "sixty-one billion, six hundred seven million, one hundred ninety-nine thousand, four hundred twenty-nine".