155415476720 has 80 divisors (see below), whose sum is σ = 430915991040. Its totient is φ = 50968549632.

The previous prime is 155415476719. The next prime is 155415476779. The reversal of 155415476720 is 27674514551.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6020330 + ... + 6046089.

It is an arithmetic number, because the mean of its divisors is an integer number (5386449888).

Almost surely, 2^155415476720 is an apocalyptic number.

155415476720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155415476720 is an abundant number, since it is smaller than the sum of its proper divisors (275500514320).

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

155415476720 is a wasteful number, since it uses less digits than its factorization.

155415476720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12066462 (or 12066456 counting only the distinct ones).

The product of its (nonzero) digits is 1176000, while the sum is 47.

The spelling of 155415476720 in words is "one hundred fifty-five billion, four hundred fifteen million, four hundred seventy-six thousand, seven hundred twenty".