3500367036721 has 2 divisors, whose sum is σ = 3500367036722. Its totient is φ = 3500367036720.

The previous prime is 3500367036701. The next prime is 3500367036781. The reversal of 3500367036721 is 1276307630053.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2259727491121 + 1240639545600 = 1503239^2 + 1113840^2 .

It is a cyclic number.

It is not a de Polignac number, because 3500367036721 - 2⁵ = 3500367036689 is a prime.

It is not a weakly prime, because it can be changed into another prime (3500367036701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1750183518360 + 1750183518361.

It is an arithmetic number, because the mean of its divisors is an integer number (1750183518361).

Almost surely, 2^{3500367036721} is an apocalyptic number.

It is an amenable number.

3500367036721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3500367036721 is an equidigital number, since it uses as much as digits as its factorization.

3500367036721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 43.

The spelling of 3500367036721 in words is "three trillion, five hundred billion, three hundred sixty-seven million, thirty-six thousand, seven hundred twenty-one".