61535403 has 32 divisors (see below), whose sum is σ = 96696320. Its totient is φ = 38607840.

The previous prime is 61535381. The next prime is 61535417. The reversal of 61535403 is 30453516.

61535403 is a `hidden beast` number, since 615 + 3 + 5 + 40 + 3 = 666.

It is not a de Polignac number, because 61535403 - 2⁶ = 61535339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61535003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29976 + ... + 31962.

It is an arithmetic number, because the mean of its divisors is an integer number (3021760).

Almost surely, 2^61535403 is an apocalyptic number.

61535403 is a deficient number, since it is larger than the sum of its proper divisors (35160917).

61535403 is a wasteful number, since it uses less digits than its factorization.

61535403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064 (or 2058 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 61535403 is about 7844.4504587638. The cubic root of 61535403 is about 394.7980658805.

Adding to 61535403 its reverse (30453516), we get a palindrome (91988919).

The spelling of 61535403 in words is "sixty-one million, five hundred thirty-five thousand, four hundred three".