155668755 has 32 divisors (see below), whose sum is σ = 272844288. Its totient is φ = 75161600.

The previous prime is 155668739. The next prime is 155668757. The reversal of 155668755 is 557866551.

It is not a de Polignac number, because 155668755 - 2⁴ = 155668739 is a prime.

It is a super-2 number, since 2×155668755² = 48465522566500050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155668757) 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, 40570 + ... + 44240.

It is an arithmetic number, because the mean of its divisors is an integer number (8526384).

Almost surely, 2^155668755 is an apocalyptic number.

155668755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155668755 is a deficient number, since it is larger than the sum of its proper divisors (117175533).

155668755 is a wasteful number, since it uses less digits than its factorization.

155668755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947.

The product of its digits is 1260000, while the sum is 48.

The square root of 155668755 is about 12476.7285375614. The cubic root of 155668755 is about 537.9399736330.

The spelling of 155668755 in words is "one hundred fifty-five million, six hundred sixty-eight thousand, seven hundred fifty-five".