155278456 has 8 divisors (see below), whose sum is σ = 291147120. Its totient is φ = 77639224.

The previous prime is 155278397. The next prime is 155278471. The reversal of 155278456 is 654872551.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×155278456² = 48222797795487872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9704896 + ... + 9704911.

It is an arithmetic number, because the mean of its divisors is an integer number (36393390).

Almost surely, 2^155278456 is an apocalyptic number.

It is an amenable number.

155278456 is a deficient number, since it is larger than the sum of its proper divisors (135868664).

155278456 is a wasteful number, since it uses less digits than its factorization.

155278456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19409813 (or 19409809 counting only the distinct ones).

The product of its digits is 336000, while the sum is 43.

The square root of 155278456 is about 12461.0776420019. The cubic root of 155278456 is about 537.4900157511.

It can be divided in two parts, 1552 and 78456, that added together give a palindrome (80008).

The spelling of 155278456 in words is "one hundred fifty-five million, two hundred seventy-eight thousand, four hundred fifty-six".