61780372 has 12 divisors (see below), whose sum is σ = 110416320. Its totient is φ = 30232856.

The previous prime is 61780361. The next prime is 61780391. The reversal of 61780372 is 27308716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164122 + ... + 164497.

It is an arithmetic number, because the mean of its divisors is an integer number (9201360).

Almost surely, 2^61780372 is an apocalyptic number.

It is an amenable number.

61780372 is a deficient number, since it is larger than the sum of its proper divisors (48635948).

61780372 is a wasteful number, since it uses less digits than its factorization.

61780372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328670 (or 328668 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 61780372 is about 7860.0491092613. The cubic root of 61780372 is about 395.3212619002.

The spelling of 61780372 in words is "sixty-one million, seven hundred eighty thousand, three hundred seventy-two".