61615740 has 48 divisors (see below), whose sum is σ = 172867968. Its totient is φ = 16398144.

The previous prime is 61615711. The next prime is 61615753. The reversal of 61615740 is 4751616.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 61615698 and 61615707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52399 + ... + 53561.

It is an arithmetic number, because the mean of its divisors is an integer number (3601416).

Almost surely, 2^61615740 is an apocalyptic number.

61615740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61615740 is an abundant number, since it is smaller than the sum of its proper divisors (111252228).

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

61615740 is a wasteful number, since it uses less digits than its factorization.

61615740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058 (or 2056 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 61615740 is about 7849.5694149425. The cubic root of 61615740 is about 394.9697995390.

The spelling of 61615740 in words is "sixty-one million, six hundred fifteen thousand, seven hundred forty".