155650661551554 has 96 divisors (see below), whose sum is σ = 343329736207104. Its totient is φ = 47010986193600.

The previous prime is 155650661551531. The next prime is 155650661551571. The reversal of 155650661551554 is 455155166056551.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15178629 + ... + 23274279.

It is an arithmetic number, because the mean of its divisors is an integer number (3576351418824).

Almost surely, 2^{155650661551554} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155650661551554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171664868103552).

155650661551554 is an abundant number, since it is smaller than the sum of its proper divisors (187679074655550).

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

155650661551554 is a wasteful number, since it uses less digits than its factorization.

155650661551554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8096032 (or 8096019 counting only the distinct ones).

The product of its (nonzero) digits is 67500000, while the sum is 60.

The spelling of 155650661551554 in words is "one hundred fifty-five trillion, six hundred fifty billion, six hundred sixty-one million, five hundred fifty-one thousand, five hundred fifty-four".