155540105251511 has 2 divisors, whose sum is σ = 155540105251512. Its totient is φ = 155540105251510.

The previous prime is 155540105251501. The next prime is 155540105251547. The reversal of 155540105251511 is 115152501045551.

155540105251511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155540105251511 is a prime.

It is a super-2 number, since 2×155540105251511² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155540105251501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77770052625755 + 77770052625756.

It is an arithmetic number, because the mean of its divisors is an integer number (77770052625756).

Almost surely, 2^{155540105251511} is an apocalyptic number.

155540105251511 is a deficient number, since it is larger than the sum of its proper divisors (1).

155540105251511 is an equidigital number, since it uses as much as digits as its factorization.

155540105251511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125000, while the sum is 41.

The spelling of 155540105251511 in words is "one hundred fifty-five trillion, five hundred forty billion, one hundred five million, two hundred fifty-one thousand, five hundred eleven".