155495746665 has 72 divisors (see below), whose sum is σ = 320821795008. Its totient is φ = 69430616640.

The previous prime is 155495746657. The next prime is 155495746739. The reversal of 155495746665 is 566647594551.

It is not a de Polignac number, because 155495746665 - 2³ = 155495746657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 725181 + ... + 914810.

It is an arithmetic number, because the mean of its divisors is an integer number (4455858264).

Almost surely, 2^155495746665 is an apocalyptic number.

155495746665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155495746665 is an abundant number, since it is smaller than the sum of its proper divisors (165326048343).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155495746665 is a wasteful number, since it uses less digits than its factorization.

155495746665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640059 (or 1640049 counting only the distinct ones).

The product of its digits is 136080000, while the sum is 63.

The spelling of 155495746665 in words is "one hundred fifty-five billion, four hundred ninety-five million, seven hundred forty-six thousand, six hundred sixty-five".