155053221740 has 12 divisors (see below), whose sum is σ = 325611765696. Its totient is φ = 62021288688.

The previous prime is 155053221731. The next prime is 155053221779. The reversal of 155053221740 is 47122350551.

It is a self number, because there is not a number n which added to its sum of digits gives 155053221740.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3876330524 + ... + 3876330563.

It is an arithmetic number, because the mean of its divisors is an integer number (27134313808).

Almost surely, 2^155053221740 is an apocalyptic number.

155053221740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155053221740 is an abundant number, since it is smaller than the sum of its proper divisors (170558543956).

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

155053221740 is a wasteful number, since it uses less digits than its factorization.

155053221740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752661096 (or 7752661094 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The spelling of 155053221740 in words is "one hundred fifty-five billion, fifty-three million, two hundred twenty-one thousand, seven hundred forty".