61473891297 has 128 divisors (see below), whose sum is σ = 109100400640. Its totient is φ = 29883168000.

The previous prime is 61473891287. The next prime is 61473891337. The reversal of 61473891297 is 79219837416.

It is a happy number.

It is not a de Polignac number, because 61473891297 - 2⁸ = 61473891041 is a prime.

It is a super-2 number, since 2×61473891297² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (61473891247) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 81855672 + ... + 81856422.

It is an arithmetic number, because the mean of its divisors is an integer number (852346880).

Almost surely, 2^61473891297 is an apocalyptic number.

It is an amenable number.

61473891297 is a deficient number, since it is larger than the sum of its proper divisors (47626509343).

61473891297 is a wasteful number, since it uses less digits than its factorization.

61473891297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203.

The product of its digits is 4572288, while the sum is 57.

The spelling of 61473891297 in words is "sixty-one billion, four hundred seventy-three million, eight hundred ninety-one thousand, two hundred ninety-seven".