1545655272 has 32 divisors (see below), whose sum is σ = 4416158400. Its totient is φ = 441615744.

The previous prime is 1545655261. The next prime is 1545655277. The reversal of 1545655272 is 2725565451.

It is a super-2 number, since 2×1545655272² = 4778100439722787968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1545655277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4599997 + ... + 4600332.

It is an arithmetic number, because the mean of its divisors is an integer number (138004950).

Almost surely, 2^1545655272 is an apocalyptic number.

1545655272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1545655272 is an abundant number, since it is smaller than the sum of its proper divisors (2870503128).

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

1545655272 is a wasteful number, since it uses less digits than its factorization.

1545655272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9200345 (or 9200341 counting only the distinct ones).

The product of its digits is 420000, while the sum is 42.

The square root of 1545655272 is about 39314.8225482451. The cubic root of 1545655272 is about 1156.2121970908.

The spelling of 1545655272 in words is "one billion, five hundred forty-five million, six hundred fifty-five thousand, two hundred seventy-two".