155261267162749 has 16 divisors (see below), whose sum is σ = 171537312522240. Its totient is φ = 139345814790000.

The previous prime is 155261267162707. The next prime is 155261267162819. The reversal of 155261267162749 is 947261762162551.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 155261267162749 - 2¹⁷ = 155261267031677 is a prime.

It is a super-2 number, since 2×155261267162749² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155261267166749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472177 + ... + 17627974.

It is an arithmetic number, because the mean of its divisors is an integer number (10721082032640).

Almost surely, 2^{155261267162749} is an apocalyptic number.

It is an amenable number.

155261267162749 is a deficient number, since it is larger than the sum of its proper divisors (16276045359491).

155261267162749 is a wasteful number, since it uses less digits than its factorization.

155261267162749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18110112.

The product of its digits is 76204800, while the sum is 64.

The spelling of 155261267162749 in words is "one hundred fifty-five trillion, two hundred sixty-one billion, two hundred sixty-seven million, one hundred sixty-two thousand, seven hundred forty-nine".