155145701633 has 4 divisors (see below), whose sum is σ = 167079986388. Its totient is φ = 143211416880.

The previous prime is 155145701621. The next prime is 155145701651. The reversal of 155145701633 is 336107541551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 336107541551 = 593 ⋅566791807.

It can be written as a sum of positive squares in 2 ways, for example, as 6378897424 + 148766804209 = 79868^2 + 385703^2 .

It is a cyclic number.

It is not a de Polignac number, because 155145701633 - 2¹² = 155145697537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155145701603) 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, 5967142358 + ... + 5967142383.

It is an arithmetic number, because the mean of its divisors is an integer number (41769996597).

Almost surely, 2^155145701633 is an apocalyptic number.

155145701633 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

155145701633 is a deficient number, since it is larger than the sum of its proper divisors (11934284755).

155145701633 is a wasteful number, since it uses less digits than its factorization.

155145701633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11934284754.

The product of its (nonzero) digits is 189000, while the sum is 41.

The spelling of 155145701633 in words is "one hundred fifty-five billion, one hundred forty-five million, seven hundred one thousand, six hundred thirty-three".