155354640 has 320 divisors, whose sum is σ = 601866240. Its totient is φ = 32348160.

The previous prime is 155354629. The next prime is 155354651. The reversal of 155354640 is 46453551.

It is an interprime number because it is at equal distance from previous prime (155354629) and next prime (155354651).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 989442 + ... + 989598.

It is an arithmetic number, because the mean of its divisors is an integer number (1880832).

Almost surely, 2^155354640 is an apocalyptic number.

155354640 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 155354640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300933120).

155354640 is an abundant number, since it is smaller than the sum of its proper divisors (446511600).

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

155354640 is a wasteful number, since it uses less digits than its factorization.

155354640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 155354640 is about 12464.1341456196. The cubic root of 155354640 is about 537.5779039778.

The spelling of 155354640 in words is "one hundred fifty-five million, three hundred fifty-four thousand, six hundred forty".