155456747 has 4 divisors (see below), whose sum is σ = 162215760. Its totient is φ = 148697736.

The previous prime is 155456671. The next prime is 155456761. The reversal of 155456747 is 747654551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747654551 = 7 ⋅106807793.

It is a cyclic number.

It is not a de Polignac number, because 155456747 - 2¹⁶ = 155391211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155456698 and 155456707.

It is not an unprimeable number, because it can be changed into a prime (155456447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3379472 + ... + 3379517.

It is an arithmetic number, because the mean of its divisors is an integer number (40553940).

Almost surely, 2^155456747 is an apocalyptic number.

155456747 is a deficient number, since it is larger than the sum of its proper divisors (6759013).

155456747 is an equidigital number, since it uses as much as digits as its factorization.

155456747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6759012.

The product of its digits is 588000, while the sum is 44.

The square root of 155456747 is about 12468.2295054270. The cubic root of 155456747 is about 537.6956527317.

The spelling of 155456747 in words is "one hundred fifty-five million, four hundred fifty-six thousand, seven hundred forty-seven".