61086967979 has 2 divisors, whose sum is σ = 61086967980. Its totient is φ = 61086967978.

The previous prime is 61086967951. The next prime is 61086967993. The reversal of 61086967979 is 97976968016.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61086967979 is a prime.

It is not a weakly prime, because it can be changed into another prime (61086967919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30543483989 + 30543483990.

It is an arithmetic number, because the mean of its divisors is an integer number (30543483990).

Almost surely, 2^61086967979 is an apocalyptic number.

61086967979 is a deficient number, since it is larger than the sum of its proper divisors (1).

61086967979 is an equidigital number, since it uses as much as digits as its factorization.

61086967979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61725888, while the sum is 68.

The spelling of 61086967979 in words is "sixty-one billion, eighty-six million, nine hundred sixty-seven thousand, nine hundred seventy-nine".