155016653440 has 64 divisors (see below), whose sum is σ = 404276404320. Its totient is φ = 56369689600.

The previous prime is 155016653387. The next prime is 155016653461. The reversal of 155016653440 is 44356610551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 155016653393 and 155016653402.

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, 11002666 + ... + 11016745.

Almost surely, 2^155016653440 is an apocalyptic number.

155016653440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155016653440 is an abundant number, since it is smaller than the sum of its proper divisors (249259750880).

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

155016653440 is a wasteful number, since it uses less digits than its factorization.

155016653440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22019441 (or 22019429 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

The spelling of 155016653440 in words is "one hundred fifty-five billion, sixteen million, six hundred fifty-three thousand, four hundred forty".