61901436 has 12 divisors (see below), whose sum is σ = 144436712. Its totient is φ = 20633808.

The previous prime is 61901429. The next prime is 61901447. The reversal of 61901436 is 63410916.

61901436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2579215 + ... + 2579238.

Almost surely, 2^61901436 is an apocalyptic number.

It is an amenable number.

61901436 is an abundant number, since it is smaller than the sum of its proper divisors (82535276).

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

61901436 is a wasteful number, since it uses less digits than its factorization.

61901436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5158460 (or 5158458 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 61901436 is about 7867.7465642965. The cubic root of 61901436 is about 395.5793155198.

It can be divided in two parts, 6190 and 1436, that added together give a triangular number (7626 = T₁₂₃).

The spelling of 61901436 in words is "sixty-one million, nine hundred one thousand, four hundred thirty-six".