15470778540 has 48 divisors (see below), whose sum is σ = 49506492672. Its totient is φ = 3536177856.

The previous prime is 15470778511. The next prime is 15470778541. The reversal of 15470778540 is 4587707451.

It is a self number, because there is not a number n which added to its sum of digits gives 15470778540.

It is not an unprimeable number, because it can be changed into a prime (15470778541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18417174 + ... + 18418013.

It is an arithmetic number, because the mean of its divisors is an integer number (1031385264).

Almost surely, 2^15470778540 is an apocalyptic number.

15470778540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15470778540 is an abundant number, since it is smaller than the sum of its proper divisors (34035714132).

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

15470778540 is a wasteful number, since it uses less digits than its factorization.

15470778540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36835206 (or 36835204 counting only the distinct ones).

The product of its (nonzero) digits is 1097600, while the sum is 48.

The spelling of 15470778540 in words is "fifteen billion, four hundred seventy million, seven hundred seventy-eight thousand, five hundred forty".