155540549892 has 384 divisors, whose sum is σ = 475517952000. Its totient is φ = 38454349824.

The previous prime is 155540549881. The next prime is 155540549903. The reversal of 155540549892 is 298945045551.

It is an interprime number because it is at equal distance from previous prime (155540549881) and next prime (155540549903).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 333063043 + ... + 333063509.

It is an arithmetic number, because the mean of its divisors is an integer number (1238328000).

Almost surely, 2^155540549892 is an apocalyptic number.

155540549892 is a gapful number since it is divisible by the number (12) 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 155540549892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237758976000).

155540549892 is an abundant number, since it is smaller than the sum of its proper divisors (319977402108).

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

155540549892 is a wasteful number, since it uses less digits than its factorization.

155540549892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 12960000, while the sum is 57.

The spelling of 155540549892 in words is "one hundred fifty-five billion, five hundred forty million, five hundred forty-nine thousand, eight hundred ninety-two".