155512713772640 has 48 divisors (see below), whose sum is σ = 419884327189152. Its totient is φ = 53318644721664.

The previous prime is 155512713772589. The next prime is 155512713772673. The reversal of 155512713772640 is 46277317215551.

It is a super-2 number, since 2×155512713772640² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 69425317529 + ... + 69425319768.

It is an arithmetic number, because the mean of its divisors is an integer number (8747590149774).

Almost surely, 2^{155512713772640} is an apocalyptic number.

155512713772640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155512713772640 is an abundant number, since it is smaller than the sum of its proper divisors (264371613416512).

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

155512713772640 is a wasteful number, since it uses less digits than its factorization.

155512713772640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138850637319 (or 138850637311 counting only the distinct ones).

The product of its (nonzero) digits is 12348000, while the sum is 56.

The spelling of 155512713772640 in words is "one hundred fifty-five trillion, five hundred twelve billion, seven hundred thirteen million, seven hundred seventy-two thousand, six hundred forty".