31761619049 has 2 divisors, whose sum is σ = 31761619050. Its totient is φ = 31761619048.

The previous prime is 31761618899. The next prime is 31761619073. The reversal of 31761619049 is 94091616713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26753509225 + 5008109824 = 163565^2 + 70768^2 .

It is a cyclic number.

It is not a de Polignac number, because 31761619049 - 2²⁰ = 31760570473 is a prime.

It is a super-2 number, since 2×31761619049² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31761618994 and 31761619012.

It is not a weakly prime, because it can be changed into another prime (31761619079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15880809524 + 15880809525.

It is an arithmetic number, because the mean of its divisors is an integer number (15880809525).

Almost surely, 2^31761619049 is an apocalyptic number.

It is an amenable number.

31761619049 is a deficient number, since it is larger than the sum of its proper divisors (1).

31761619049 is an equidigital number, since it uses as much as digits as its factorization.

31761619049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 31761619049 in words is "thirty-one billion, seven hundred sixty-one million, six hundred nineteen thousand, forty-nine".