61524158779 has 2 divisors, whose sum is σ = 61524158780. Its totient is φ = 61524158778.

The previous prime is 61524158743. The next prime is 61524158783. The reversal of 61524158779 is 97785142516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61524158779 - 2⁷ = 61524158651 is a prime.

It is a super-2 number, since 2×61524158779² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61524158789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30762079389 + 30762079390.

It is an arithmetic number, because the mean of its divisors is an integer number (30762079390).

Almost surely, 2^61524158779 is an apocalyptic number.

61524158779 is a deficient number, since it is larger than the sum of its proper divisors (1).

61524158779 is an equidigital number, since it uses as much as digits as its factorization.

61524158779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 55.

The spelling of 61524158779 in words is "sixty-one billion, five hundred twenty-four million, one hundred fifty-eight thousand, seven hundred seventy-nine".