155016061665 has 32 divisors (see below), whose sum is σ = 249976526976. Its totient is φ = 82025249280.

The previous prime is 155016061661. The next prime is 155016061747. The reversal of 155016061665 is 566160610551.

It is not a de Polignac number, because 155016061665 - 2² = 155016061661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155016061661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14168077 + ... + 14179013.

It is an arithmetic number, because the mean of its divisors is an integer number (7811766468).

Almost surely, 2^155016061665 is an apocalyptic number.

155016061665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155016061665 is a deficient number, since it is larger than the sum of its proper divisors (94960465311).

155016061665 is a wasteful number, since it uses less digits than its factorization.

155016061665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18289.

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 155016061665 in words is "one hundred fifty-five billion, sixteen million, sixty-one thousand, six hundred sixty-five".