61155550701 has 48 divisors (see below), whose sum is σ = 105507507456. Its totient is φ = 33374930688.

The previous prime is 61155550681. The next prime is 61155550717. The reversal of 61155550701 is 10705555116.

It is a happy number.

It is not a de Polignac number, because 61155550701 - 2²¹ = 61153453549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61155550741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 913881 + ... + 978513.

It is an arithmetic number, because the mean of its divisors is an integer number (2198073072).

Almost surely, 2^61155550701 is an apocalyptic number.

It is an amenable number.

61155550701 is a deficient number, since it is larger than the sum of its proper divisors (44351956755).

61155550701 is a wasteful number, since it uses less digits than its factorization.

61155550701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65322 (or 65319 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 36.

The spelling of 61155550701 in words is "sixty-one billion, one hundred fifty-five million, five hundred fifty thousand, seven hundred one".