155670920280 has 512 divisors, whose sum is σ = 550258790400. Its totient is φ = 39100465152.

The previous prime is 155670920267. The next prime is 155670920281. The reversal of 155670920280 is 82029076551.

155670920280 is a `hidden beast` number, since 1 + 5 + 567 + 0 + 9 + 2 + 0 + 2 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155670920281) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 159335152 + ... + 159336128.

It is an arithmetic number, because the mean of its divisors is an integer number (1074724200).

Almost surely, 2^155670920280 is an apocalyptic number.

155670920280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155670920280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275129395200).

155670920280 is an abundant number, since it is smaller than the sum of its proper divisors (394587870120).

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

155670920280 is a wasteful number, since it uses less digits than its factorization.

155670920280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160 (or 1150 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The spelling of 155670920280 in words is "one hundred fifty-five billion, six hundred seventy million, nine hundred twenty thousand, two hundred eighty".