61351129699 has 2 divisors, whose sum is σ = 61351129700. Its totient is φ = 61351129698.

The previous prime is 61351129657. The next prime is 61351129733. The reversal of 61351129699 is 99692115316.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61351129699 - 2⁷ = 61351129571 is a prime.

It is a super-2 number, since 2×61351129699² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (61351129799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30675564849 + 30675564850.

It is an arithmetic number, because the mean of its divisors is an integer number (30675564850).

Almost surely, 2^61351129699 is an apocalyptic number.

61351129699 is a deficient number, since it is larger than the sum of its proper divisors (1).

61351129699 is an equidigital number, since it uses as much as digits as its factorization.

61351129699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 52.

The spelling of 61351129699 in words is "sixty-one billion, three hundred fifty-one million, one hundred twenty-nine thousand, six hundred ninety-nine".