61129670479 has 2 divisors, whose sum is σ = 61129670480. Its totient is φ = 61129670478.

The previous prime is 61129670471. The next prime is 61129670491. The reversal of 61129670479 is 97407692116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61129670479 - 2³ = 61129670471 is a prime.

It is a super-2 number, since 2×61129670479² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61129670471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30564835239 + 30564835240.

It is an arithmetic number, because the mean of its divisors is an integer number (30564835240).

Almost surely, 2^61129670479 is an apocalyptic number.

61129670479 is a deficient number, since it is larger than the sum of its proper divisors (1).

61129670479 is an equidigital number, since it uses as much as digits as its factorization.

61129670479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The spelling of 61129670479 in words is "sixty-one billion, one hundred twenty-nine million, six hundred seventy thousand, four hundred seventy-nine".