61491852 has 24 divisors (see below), whose sum is σ = 159423600. Its totient is φ = 20497248.

The previous prime is 61491827. The next prime is 61491887. The reversal of 61491852 is 25819416.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284577 + ... + 284792.

It is an arithmetic number, because the mean of its divisors is an integer number (6642650).

Almost surely, 2^61491852 is an apocalyptic number.

It is an amenable number.

61491852 is an abundant number, since it is smaller than the sum of its proper divisors (97931748).

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

61491852 is a wasteful number, since it uses less digits than its factorization.

61491852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569382 (or 569374 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 61491852 is about 7841.6740559653. The cubic root of 61491852 is about 394.7049059131.

It can be divided in two parts, 6149 and 1852, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 61491852 in words is "sixty-one million, four hundred ninety-one thousand, eight hundred fifty-two".