61772154 has 40 divisors (see below), whose sum is σ = 132058560. Its totient is φ = 19260072.

The previous prime is 61772143. The next prime is 61772167. The reversal of 61772154 is 45127716.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 781887 + ... + 781965.

It is an arithmetic number, because the mean of its divisors is an integer number (3301464).

Almost surely, 2^61772154 is an apocalyptic number.

61772154 is an abundant number, since it is smaller than the sum of its proper divisors (70286406).

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

61772154 is an frugal number, since it uses more digits than its factorization.

61772154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 103 counting only the distinct ones).

The product of its digits is 11760, while the sum is 33.

The square root of 61772154 is about 7859.5263216049. The cubic root of 61772154 is about 395.3037326317.

It can be divided in two parts, 617 and 72154, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 61772154 in words is "sixty-one million, seven hundred seventy-two thousand, one hundred fifty-four".