74899099861 has 2 divisors, whose sum is σ = 74899099862. Its totient is φ = 74899099860.

The previous prime is 74899099831. The next prime is 74899099883. The reversal of 74899099861 is 16899099847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54312302500 + 20586797361 = 233050^2 + 143481^2 .

It is a cyclic number.

It is not a de Polignac number, because 74899099861 - 2¹⁷ = 74898968789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74899099801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37449549930 + 37449549931.

It is an arithmetic number, because the mean of its divisors is an integer number (37449549931).

Almost surely, 2^74899099861 is an apocalyptic number.

It is an amenable number.

74899099861 is a deficient number, since it is larger than the sum of its proper divisors (1).

74899099861 is an equidigital number, since it uses as much as digits as its factorization.

74899099861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70543872, while the sum is 70.

The spelling of 74899099861 in words is "seventy-four billion, eight hundred ninety-nine million, ninety-nine thousand, eight hundred sixty-one".