61503705 has 40 divisors (see below), whose sum is σ = 116749512. Its totient is φ = 30868992.

The previous prime is 61503697. The next prime is 61503709. The reversal of 61503705 is 50730516.

It can be written as a sum of positive squares in 4 ways, for example, as 6906384 + 54597321 = 2628^2 + 7389^2 .

It is not a de Polignac number, because 61503705 - 2³ = 61503697 is a prime.

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

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (61503709) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2419 + ... + 11351.

Almost surely, 2^61503705 is an apocalyptic number.

It is an amenable number.

61503705 is a deficient number, since it is larger than the sum of its proper divisors (55245807).

61503705 is a wasteful number, since it uses less digits than its factorization.

61503705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8967 (or 8958 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 61503705 is about 7842.4297892936. The cubic root of 61503705 is about 394.7302650273.

The spelling of 61503705 in words is "sixty-one million, five hundred three thousand, seven hundred five".