2155354456464 has 160 divisors (see below), whose sum is σ = 6811009603200. Its totient is φ = 647145469440.

The previous prime is 2155354456457. The next prime is 2155354456469. The reversal of 2155354456464 is 4646544535512.

2155354456464 is a `hidden beast` number, since 2 + 1 + 5 + 5 + 3 + 544 + 56 + 46 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 2155354456464.

It is not an unprimeable number, because it can be changed into a prime (2155354456469) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1562619 + ... + 2598554.

It is an arithmetic number, because the mean of its divisors is an integer number (42568810020).

Almost surely, 2^{2155354456464} is an apocalyptic number.

2155354456464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2155354456464 is an abundant number, since it is smaller than the sum of its proper divisors (4655655146736).

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

2155354456464 is a wasteful number, since it uses less digits than its factorization.

2155354456464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161310 (or 4161298 counting only the distinct ones).

The product of its digits is 34560000, while the sum is 54.

The spelling of 2155354456464 in words is "two trillion, one hundred fifty-five billion, three hundred fifty-four million, four hundred fifty-six thousand, four hundred sixty-four".