155251720711 has 4 divisors (see below), whose sum is σ = 155947916992. Its totient is φ = 154555524432.

The previous prime is 155251720643. The next prime is 155251720721. The reversal of 155251720711 is 117027152551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 117027152551 = 7459 ⋅15689389.

It is a cyclic number.

It is not a de Polignac number, because 155251720711 - 2⁷ = 155251720583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155251720721) 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, 348097806 + ... + 348098251.

It is an arithmetic number, because the mean of its divisors is an integer number (38986979248).

Almost surely, 2^155251720711 is an apocalyptic number.

155251720711 is a deficient number, since it is larger than the sum of its proper divisors (696196281).

155251720711 is an equidigital number, since it uses as much as digits as its factorization.

155251720711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696196280.

The product of its (nonzero) digits is 24500, while the sum is 37.

The spelling of 155251720711 in words is "one hundred fifty-five billion, two hundred fifty-one million, seven hundred twenty thousand, seven hundred eleven".