145405515515 has 16 divisors (see below), whose sum is σ = 188200957728. Its totient is φ = 107209357056.

The previous prime is 145405515509. The next prime is 145405515533. The reversal of 145405515515 is 515515504541.

It is a cyclic number.

It is not a de Polignac number, because 145405515515 - 2⁴ = 145405515499 is a prime.

It is a super-2 number, since 2×145405515515² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1697714 + ... + 1781303.

It is an arithmetic number, because the mean of its divisors is an integer number (11762559858).

Almost surely, 2^145405515515 is an apocalyptic number.

145405515515 is a deficient number, since it is larger than the sum of its proper divisors (42795442213).

145405515515 is a wasteful number, since it uses less digits than its factorization.

145405515515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479678.

The product of its (nonzero) digits is 250000, while the sum is 41.

The spelling of 145405515515 in words is "one hundred forty-five billion, four hundred five million, five hundred fifteen thousand, five hundred fifteen".