155401554140 has 24 divisors (see below), whose sum is σ = 372963730272. Its totient is φ = 53280532800.

The previous prime is 155401554131. The next prime is 155401554163. The reversal of 155401554140 is 41455104551.

It is a super-2 number, since 2×155401554140² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 155401554140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555005411 + ... + 555005690.

It is an arithmetic number, because the mean of its divisors is an integer number (15540155428).

Almost surely, 2^155401554140 is an apocalyptic number.

155401554140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155401554140 is an abundant number, since it is smaller than the sum of its proper divisors (217562176132).

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

155401554140 is a wasteful number, since it uses less digits than its factorization.

155401554140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110011117 (or 1110011115 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 35.

Adding to 155401554140 its reverse (41455104551), we get a palindrome (196856658691).

The spelling of 155401554140 in words is "one hundred fifty-five billion, four hundred one million, five hundred fifty-four thousand, one hundred forty".