2978612505 has 24 divisors (see below), whose sum is σ = 5632286400. Its totient is φ = 1444175520.

The previous prime is 2978612491. The next prime is 2978612557. The reversal of 2978612505 is 5052168792.

2978612505 is a `hidden beast` number, since 29 + 7 + 8 + 612 + 5 + 0 + 5 = 666.

It is not a de Polignac number, because 2978612505 - 2¹³ = 2978604313 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3008205 + ... + 3009194.

It is an arithmetic number, because the mean of its divisors is an integer number (234678600).

Almost surely, 2^2978612505 is an apocalyptic number.

It is an amenable number.

2978612505 is a deficient number, since it is larger than the sum of its proper divisors (2653673895).

2978612505 is a wasteful number, since it uses less digits than its factorization.

2978612505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6017421 (or 6017418 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 2978612505 is about 54576.6663052994. Note that the first 3 decimals coincide. The cubic root of 2978612505 is about 1438.8140481396.

The spelling of 2978612505 in words is "two billion, nine hundred seventy-eight million, six hundred twelve thousand, five hundred five".