615561048 has 96 divisors (see below), whose sum is σ = 1743206400. Its totient is φ = 195998400.

The previous prime is 615560987. The next prime is 615561071. The reversal of 615561048 is 840165516.

615561048 is a `hidden beast` number, since 61 + 556 + 1 + 0 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 174583 + ... + 178073.

It is an arithmetic number, because the mean of its divisors is an integer number (18158400).

Almost surely, 2^615561048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 615561048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871603200).

615561048 is an abundant number, since it is smaller than the sum of its proper divisors (1127645352).

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

615561048 is a wasteful number, since it uses less digits than its factorization.

615561048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613 (or 3606 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 615561048 is about 24810.5027760422. The cubic root of 615561048 is about 850.6620208154.

The spelling of 615561048 in words is "six hundred fifteen million, five hundred sixty-one thousand, forty-eight".