155312561641465 has 16 divisors (see below), whose sum is σ = 186650839166400. Its totient is φ = 124066295272512.

The previous prime is 155312561641463. The next prime is 155312561641553. The reversal of 155312561641465 is 564146165213551.

It is a cyclic number.

It is not a de Polignac number, because 155312561641465 - 2¹ = 155312561641463 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155312561641463) 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, 8312706 + ... + 19486564.

It is an arithmetic number, because the mean of its divisors is an integer number (11665677447900).

Almost surely, 2^{155312561641465} is an apocalyptic number.

It is an amenable number.

155312561641465 is a deficient number, since it is larger than the sum of its proper divisors (31338277524935).

155312561641465 is a wasteful number, since it uses less digits than its factorization.

155312561641465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11177976.

The product of its digits is 12960000, while the sum is 55.

The spelling of 155312561641465 in words is "one hundred fifty-five trillion, three hundred twelve billion, five hundred sixty-one million, six hundred forty-one thousand, four hundred sixty-five".