20155651151515 has 32 divisors (see below), whose sum is σ = 26542973426112. Its totient is φ = 14571245568000.

The previous prime is 20155651151507. The next prime is 20155651151579. The reversal of 20155651151515 is 51515115655102.

It is not a de Polignac number, because 20155651151515 - 2³ = 20155651151507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52340475 + ... + 52724155.

It is an arithmetic number, because the mean of its divisors is an integer number (829467919566).

Almost surely, 2^{20155651151515} is an apocalyptic number.

20155651151515 is a deficient number, since it is larger than the sum of its proper divisors (6387322274597).

20155651151515 is a wasteful number, since it uses less digits than its factorization.

20155651151515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389391.

The product of its (nonzero) digits is 187500, while the sum is 43.

The spelling of 20155651151515 in words is "twenty trillion, one hundred fifty-five billion, six hundred fifty-one million, one hundred fifty-one thousand, five hundred fifteen".