10698721157 has 2 divisors, whose sum is σ = 10698721158. Its totient is φ = 10698721156.

The previous prime is 10698721063. The next prime is 10698721171. The reversal of 10698721157 is 75112789601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6456283201 + 4242437956 = 80351^2 + 65134^2 .

It is a cyclic number.

It is not a de Polignac number, because 10698721157 - 2¹² = 10698717061 is a prime.

It is a super-2 number, since 2×10698721157² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10698721757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5349360578 + 5349360579.

It is an arithmetic number, because the mean of its divisors is an integer number (5349360579).

Almost surely, 2^10698721157 is an apocalyptic number.

It is an amenable number.

10698721157 is a deficient number, since it is larger than the sum of its proper divisors (1).

10698721157 is an equidigital number, since it uses as much as digits as its factorization.

10698721157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 47.

The spelling of 10698721157 in words is "ten billion, six hundred ninety-eight million, seven hundred twenty-one thousand, one hundred fifty-seven".