61901590 has 16 divisors (see below), whose sum is σ = 117977472. Its totient is φ = 23304064.

The previous prime is 61901569. The next prime is 61901599. The reversal of 61901590 is 9510916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61901599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181894 + ... + 182233.

It is an arithmetic number, because the mean of its divisors is an integer number (7373592).

Almost surely, 2^61901590 is an apocalyptic number.

61901590 is a deficient number, since it is larger than the sum of its proper divisors (56075882).

61901590 is a wasteful number, since it uses less digits than its factorization.

61901590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364151.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 61901590 is about 7867.7563510826. The cubic root of 61901590 is about 395.5796435636.

The spelling of 61901590 in words is "sixty-one million, nine hundred one thousand, five hundred ninety".